*Marvel made a major splash at CinemaCon in Las Vegas, debuting a new trailer for “Avengers: Doomsday” that put Robert Downey Jr.’s Doctor Doom front and center as the ultimate threat to Earth’s mightiest heroes.

A new rumor may have just expanded the Marvel Cinematic Universe’s nostalgia play beyond what fans initially expected from the Multiverse Saga’s final chapter.

"I think for fans the notion of having the Avengers and X-Men together for the first time within our cinematic universe is incredibly exciting," Feige told Fandango.