Marvel Studios offered some more details on Avengers: Doomsday, thanks to a newly released synopsis that paints a much bigger picture of where the Marvel Cinematic Universe is headed. The synopsis reads: "Universes collide and the Multiverse Saga begins its final chapter in Marvel Studios' Avengers: Doomsday. This epic film will lay the foundation for the future of the Marvel Cinematic Universe." Tickets for Avengers: Doomsday go on sale on the morning of Monday, July 20, for the film's first two weeks of Infinity Vision showings. Avengers: Doomsday hits theaters on December 18.