As of early 2026, the Marvel Cinematic Universe (MCU) is undergoing significant shifts as it prepares for Avengers: Doomsday (scheduled for December 2026). While many legacy stars are returning—most notably Robert Downey Jr., though as Doctor Doom rather than Iron Man—several key figures have confirmed they are moving on. Scarlett Johansson (Black Widow) and Chris Evans (Captain America/Steve Rogers) have largely maintained that their character arcs are complete, despite persistent fan rumors of Multiverse cameos. Additionally, recent casting lists for the upcoming Avengers films have notably omitted Mabel Cadena (Namora), sparking speculation that her character may not return for the next phase. While the "Multiverse" provides a narrative loophole for anyone to return, many of the original "Phase One" actors have expressed a desire to focus on new projects, effectively ending their tenure as series regulars. Furthermore, some creative leads have also departed; for instance, certain directors and writers from the early Infinity Saga have shifted entirely to other studios, signaling a new era of talent behind the camera for the MCU's future.