The clock is still ticking down to Doomsday, now a little under five months away from its debut in theaters — and now with our first full trailer for the film. Marvel put tickets for Avengers: Doomsday on sale today, and they’re hyping the news with a new coming attraction for the film, new images from the biggest Marvel movie in quite a few years, and a new poster, all of which feature our best looks yet at Robert Downey Jr.’s Doctor Doom. (Surely he’s not talking about whether or not to buy Avengers: Doomsday tickets!) Here is the trailer for the new Avengers movie:In “Avengers: Doomsday,” beloved heroes from three distinct universes will be set on a deadly collision course and face an existential threat unlike anything they’ve ever encountered. Avengers: Doomsday is scheduled to open in theaters on December 18.