Marvel has dropped the first trailer for Avengers: Doomsday, giving fans their first full look at Robert Downey Jr. as the franchise's new villain, Doctor Doom. The film brings together heroes from three different Marvel universes, setting up what the studio calls an "existential threat" unlike anything they've faced before. The all-star cast includes Chris Hemsworth, Chris Evans, Pedro Pascal, Paul Rudd, Anthony Mackie, Florence Pugh, Patrick Stewart, Ian McKellen, Tom Hiddleston, Channing Tatum, and many more. The movie opens in theaters on December 18. Marvel also announced that tickets are now on presale for select Premium Large Format theaters featuring its new "Infinity Vision" presentation. Downey says the team worked hard to create a story that lives up to the massive success of Infinity War and Endgame, calling the new film the beginning of Marvel's next epic chapter.