The episode "A New World (2)" from The Flash Season 9 unfolds concurrently with Part One, focusing on Team Flash's efforts to locate Barry while he is trapped reliving his past.

The episode opens with Chester Runk finding Mark at Caitlin's old apartment. Chester detects a strong force approaching, which turns out to be Khione. Mark is waiting inside to eliminate Khione, believing she is the only one who can protect Iris. Mark's plan is to remove Khione so he can achieve his goals. Khione confronts the Negative Speed Force entity possessing Mark and demands it leave his body. The Negative Speed Force mocks her, stating she must kill Mark to stop him, but knows she won't because Mark is her best friend. It reveals a crystal that contains the Negative Speed Force inside Mark. Khione uses her powers to remove the crystal, causing Mark's body to disintegrate. She then snaps her fingers to rebirth Mark without the crystal. When she tries to retrieve the crystal, it mysteriously disappears.

Meanwhile, Chester is coordinating STAR Labs satellites to track cobalt-97 traces, the only clue to Barry's whereabouts. Iris is heavily pregnant and about to give birth. The cobalt-97 trace disappears from the satellites, signaling a change. Barry suddenly reappears in the lab, having returned from his time-travel ordeal. There is no time for reunions as Iris goes into labor, and the team rushes to the hospital.

At the hospital, Barry shares with Iris the peace he found after reliving his mother's death and coming to terms with it. Iris is happy to have Barry back and reassures him that their daughter Nora will arrive soon. Barry then leaves to inform the team that Iris and Allegra are both okay, and the baby's birth is imminent.

Meanwhile, the Negative Speed Force, which had possessed Joe West in Part One, now possesses Blaine. Blaine, under the Negative Speed Force's control, begins attacking Team Flash members one by one. He shoots Allegra with a blue cobalt laser, attempts to gas Iris at her office, manipulates Chester into chasing false leads while pretending to monitor satellites, breaks Cecile's arm off-screen, and emotionally attacks Khione, exploiting her childlike mentality to weaken her. Blaine's plan is to kill Iris and her unborn child to prevent the birth of a new Speed Force avatar.

Khione confronts the Negative Speed Force again, which taunts her by saying it can defeat her by attacking her self-esteem rather than fighting directly. The Negative Speed Force's strategy is psychological warfare, aiming to undermine Khione before a physical confrontation.

In a critical moment, the Speed Force manifests in the form of Nora Allen, Barry's mother. She blasts the Negative Speed Force with lightning, forcing it to retreat. Nora then collapses and explains to Iris that the Negative Speed Force and other negative forces are at war with her, and she is fighting them on another plane. This battle represents a final power play by the Negative Speed Force to eliminate the Speed Force and its avatar, The Flash. Eliminating Barry's child would ensure no future avatar is born.

As the episode closes, Iris is in labor at the hospital, Barry is back with the team, and the Negative Speed Force's threat remains active but temporarily repelled. The team prepares for the birth of Nora and the ongoing battle against the Negative Speed Force.

At the end of The Flash Season 9, Episode 11, "A New World (2)," Barry Allen returns from his time-travel ordeal, having made peace with his mother's death. Meanwhile, Team Flash confronts the Negative Speed Force possessing Mark Blaine. Khione removes the Negative Speed Force crystal from Mark, freeing him. Iris goes into labor, and Barry reunites with her at the hospital, ready to welcome their child together.

The episode unfolds with Team Flash grappling with Barry's mysterious disappearance. Chester finds Mark Blaine at Caitlin's old apartment, where Mark is possessed by the Negative Speed Force and plans to eliminate Khione, his best friend, to get to Iris. Khione arrives, and Mark waits inside, intending to kill her. The Negative Speed Force taunts Khione, telling her she must kill Mark to stop him, but she refuses because of their friendship.

Khione confronts the Negative Speed Force inside Mark's body. She uses her powers to remove the blue crystal imprisoning the Negative Speed Force. As she extracts it, Mark's body disintegrates, but Khione immediately uses her powers to restore him without the crystal. When she tries to retrieve the crystal, it vanishes mysteriously.

Meanwhile, the cobalt-97 traces affecting Team Flash disappear from the satellites, signaling the end of the Negative Speed Force's influence. At this moment, Iris goes into labor. Barry suddenly reappears in the lab, having returned from his journey through time where he faced his past and the Negative Speed Force. There is no time for a long reunion; the team rushes to the hospital.

At the hospital, Barry shares with Iris the peace he found after reliving the day his mother was killed. Iris is happy to have him back and reassured that their daughter, Nora, will be arriving soon. Barry then leaves to inform the team that Iris and Allegra are both doing well, and the baby is expected to be born in a few hours.

The episode closes with the team united and hopeful, having overcome the immediate threat of the Negative Speed Force. Barry's return and Iris's labor mark a new beginning for the characters, setting the stage for the final chapters of the series.

The Flash Season 9, Episode 11 titled "A New World (2)" does not have a specifically documented post-credit scene detailed in the available sources. The search results primarily discuss post-credit scenes related to The Flash 2023 movie, not the TV show episode in question.

For clarity:

• The 2023 The Flash movie features a post-credits scene where Barry Allen is seen with Jason Momoa's Aquaman leaving a bar after a night of drinking, which serves as a multiverse setup and character moment.

• The Flash TV show's Season 8 finale had a significant post-credits scene setting up Season 9, involving a mysterious blue crystal, but there is no specific mention of a post-credit scene for Season 9, Episode 11 "A New World (2)".

• The episode recap for Season 9, Episode 11 on IMDb and CBR does not mention any post-credit scene.

Therefore, based on the current information, The Flash Season 9, Episode 11 "A New World (2)" does not have a post-credit scene or at least none that has been publicly noted or described in detail.

Barry Allen disappears due to the Negative Speed Force trying to destroy the life he built. While Barry is off reliving his past, Team Flash searches for clues to find him, focusing on traces of cobalt as a key lead. Barry's absence drives the episode's main tension as the team struggles to locate him and deal with the consequences of his disappearance.

The Eddie Thawne doppelganger is revealed to be Dr. Malcolm Gilmore, who was hit by a bolt of lightning and begins investigating Eddie Thawne's life. He experiences visions of Eddie's life and Iris, leading him to seek out Iris to ask about Eddie's death. His confusion and visions add a mysterious subplot to the episode.

The Negative Speed Force possesses Mark Blaine and uses him to attack Team Flash members, including shooting Allegra with a cobalt laser, trying to gas Iris, breaking Cecile's arm off-screen, and emotionally hurting Khione. It targets Khione's self-esteem to weaken her before a direct confrontation, exploiting her childlike mentality. The Negative Speed Force's goal is to eliminate Barry's legacy by killing Iris and her unborn child, who could become the next Speed Force avatar.

Khione develops a better understanding of what she can and cannot control regarding her powers. The Negative Speed Force's psychological attack on her forces her to confront her insecurities and limits. This growth is crucial as she prepares to face the Negative Speed Force's threat alongside Team Flash.

Iris is deeply alarmed and concerned about Barry's disappearance, showing signs of emotional strain as she is about to give birth. She is proactive in searching for Barry and is supported by Cecile, though the uncertainty weighs heavily on her. Iris's determination to find Barry and protect her unborn child is a central emotional driver in the episode.

The Flash Season 9, Episode 11 ("A New World, Part Two") is generally family-friendly but contains some mild violence, intense scenes, and emotional moments that might be upsetting for very young children or sensitive viewers. There are no strong language or explicit content reported for this episode specifically, but the series overall includes mild profanity and some frightening or intense scenes typical of superhero shows.

Potentially objectionable or upsetting aspects include:

• Mild violence and action sequences involving fights and confrontations, which are common in superhero shows and may be intense for younger children.
• Emotional tension and concern among characters, especially related to Barry's disappearance, which might be upsetting for sensitive viewers.
• Some scenes involve psychological or self-esteem struggles as part of the conflict, which could be emotionally heavy.
• The episode does not contain strong language or sexual content but may have mild language typical of the series (e.g., "damn," "hell").

Overall, the episode is suitable for older children and teens familiar with superhero themes but may require parental guidance for younger or sensitive children due to mild intensity and emotional themes.