In a nice and timely fashion The Russo Brothers start the fourth installment of Avengers 4 giving us a image of a purple glove on their Facebook page stating the "Beginning of the end." This caption could be a description of how the this film is going to pan out for a lot of the Avengers.
From the footage that was revealed and described online to people who couldn't witness it first hand it looks as though the Avengers never really in a good position and looks like it'll be the end of the road for some of them.
The title of the fourth Avengers film has yet to be revealed and probably won't be until after Avengers: Infinity War comes out. Speaking of which, Avengers: Infinity Wars hits theaters May 4, 2018.