Although we know when the film will be released, there are a few other key details that are still unknown. The cast for the film was not announced during the entirety of the panel. It is also unclear whether John Krasinski, who appeared as a multiversal version of Mister Fantastic in “Doctor Strange in the Multiverse of Madness,” will reprise his role for this new movie.
Another major question that was not answered during the San Diego Comic-Con panel was who would be directing “Fantastic Four.” In December 2020, “Spider-Man: No Way Home” director Jon Watts was announced to helm the family’s return to the big screen. However, it was announced this past April that he had amicably stepped away from the director’s seat, with his decision being attributed to needing a break from superhero movies (after all, he had directed all three “Spider-Man” movies in the MCU back-to-back). Now, the seat is still presumably vacant, although there is a chance that Watts’ replacement, as well as the actors playing the four main heroes, will be announced before or during this September’s D23 expo.
Source : https://www.slashfilm.com/938631/fantastic-four-release-date-set-for-november-2024-will-be-in-phase-6-of-mcu/