Fans eagerly anticipating Rebecca Romijn's return as Mystique in the upcoming 'Avengers: Doomsday' might have to wait a bit longer. During a recent appearance at The Hollywood Reporter's San Diego Comic-Con suite, Romijn revealed she's not entirely certain her filming is complete, citing ongoing scriptwriting challenges.

“I’m not sure I’m done,” Romijn stated, adding a playful, yet revealing, explanation. “They haven’t finished writing it yet.” This unexpected comment has sent ripples of speculation through the Marvel fanbase, prompting questions about the scope of Mystique's role and the overall direction of the film.

Romijn previously portrayed Mystique in Bryan Singer's 'X-Men' films (2000, 2003, and 2006), becoming a beloved and iconic figure in the X-Men franchise. Her inclusion in 'Avengers: Doomsday,' a film that promises a monumental clash of heroes and villains, has generated considerable excitement. The character’s shapeshifting abilities and complex moral code make her a compelling addition to the already star-studded cast.

The delays in finalizing the script suggest potential shifts in the narrative or the expansion of certain characters' storylines. While Marvel Studios is known for its meticulous planning and secrecy, Romijn’s candid admission provides a rare glimpse behind the scenes of a major blockbuster production. This news also highlights the collaborative nature of filmmaking, where even established actors like Romijn remain dependent on the evolving creative process.

“Avengers: Doomsday” is expected to be a pivotal film in the Marvel Cinematic Universe, potentially setting the stage for future phases. The film is rumored to feature a massive ensemble cast, bringing together heroes from across the MCU to confront a formidable threat. The inclusion of X-Men characters like Mystique marks a significant integration of the previously separate X-Men universe into the broader MCU narrative.

While the scriptwriting delays are undoubtedly a setback, they also offer an opportunity for the creative team to refine the story and ensure Mystique’s return is both impactful and faithful to the character's legacy. Fans remain hopeful that the final product will deliver on the promise of a spectacular superhero showdown, with Rebecca Romijn’s Mystique playing a crucial role. Keep an eye out for further updates as the film progresses towards its release.

The actress is currently starring in Star Trek: Strange New Worlds, showcasing her continued presence in the science fiction genre. Her return to the superhero world with 'Avengers: Doomsday' is a welcome development for fans of both franchises.