One Marvel franchise that is a big mystery is Doctor Strange, as no details about a second film have been confirmed.
But a supporting actor not only thinks Doctor Strange 2 is coming, but that he might show up again in the MCU.
While Marvel Studios generally releases a full schedule of its phases of films, the future of the MCU following the fourth Avengers film is a giant mystery.
All we know about Phase Four is that the sequel to Spider-Man: Homecoming will be set after the events of The Avengers.