Justice League of Amerca Vs. Thanos in "Clutches of Defeat!"

Thanos is set to make a major cinematic impact with the just announced Avengers: Infinity War Part I and  Avengers: Infinity War Part II.  The rumor is that the end of Avengers: Age of Ultron will have the team disband, and a new team will assemble for the next Avengers film.  I am guessing that the team will consist of  Black Widow, Hawkeye, Quicksilver, Scarlet Witch, Vision, Ant-Man and perhaps newcomers Falcon, Black Panther and Captain Marvel - and will end with a cliffhanger in which the big guns (Hulk, Thor, Cap, Iron Man) return to join the battle against the Mad Titan... maybe they'll even throw in a few Guardians of the Galaxy for good measure.  Whatever they decide to do, it sounds like it is going to be huge!