Rumor has it that Marvel is planning to split up the third Avengers film (slated for 2018) into two parts.
Basically, they're pulling a Harry Potter/The Hobbit/Twilight/Hunger Games, as Comicbook.com puts it.
The rumor is coming out of Daily Marvelite, a fan news site for all things Marvel. And as the alleged scoop indicates, Avengers 3 could be too epic for just one roughly 2-hour sitting.
They also claim that the battle with Thanos is what will extend the film, which makes me believe the Infinity Gauntlet will indeed be the storyline Marvel may have decided to go with moving forward.
And this actually lines up with the May 2018 and May 2019 dates that Marvel hasn't outlined yet. Hence Avengers 3 and Avengers 4 will be soon to follow.
This is especially intriguing given Marvel's inevitable "big problem." That being contracts. Chris Evans and Robert Downey Jr. have only signed on for two more Avengers films, which of course include Age of Ultron set to release in 2015.
But this rumor could be Marvel's clever solution to this issue. If all of the shooting for Avengers 3 and 4 are done at the same time, the studio could possibly release two films within the constraints of the actors' contracts. Thus giving the franchise a satisfying conclusion without convincing the actors to sign on for more months of production. And it's a sweet deal since they'll still get paid.
Of course, this is assuming the rumor is true.