A Civil War variation makes a hell of a lot more sense that Thanos. Cap is clearly being pushed as a much bigger character than he was in Phase 1. Stark was in front of everyone on the posters for the first film, now he's side by side with Captain America specifically in this one. Government have been dogging them in the two movies that effect this one the most, saying that "they're dangerous" and "cant be trusted", Cap then destroys Shield and now Stark will create Ultron for The Avengers who will run amok across the world
The Civil War(Iron Man vs Captain America) is coming and so is the registration act .
I wonder if Thanos will register.
Fred.