I predict they will have been hits.
OK. I was disappointed to, my surprise, in the Winter Soldier. In particular, there was little sense of paranoia and surprise about the Hydra infiltration of SHIELD. To be honest, that was handled much better in Agents of SHIELD. I was especially disappointed that no one close to Fury or Cap turned out to be Hydra (Robert Redford didn't count). The best sequence of the film was Fury fighting off the assassination attempt. Not good if the star doesn't have the best scene. The helicarrier/Zola plot was idiotic (mathematically determining a billion people are a threat to you and killing them with airborne guns in one swoop). Flashback scenes failed to create emotional connection to Bucky and, in general, that tension was handled poorly. Overall, this was a huge disappointment as it is supposed to be the best of the Marvel movies. Feel was dull and grim, rather than dark and gripping.
Ultron had some great moments and was pretty strong. I thought using Thor for comic relief was a nice touch (Revels; will Thor be there? Good story, etc.). Ultron was played a little to close to the Joker for my taste, but wasn't bad.
The birth of Vision made no real sense and with an infinity gem, he should have been even more of a game changer than he was. I liked Wanda and Pietro although Wanda forgetting she had an accent and making up for it by making it extra thick when she remembered was annoying. Still not sure how Hulk was defeated by the Hulkbuster. But overall, I think this was the best Marvel outing so far.
Loved that Cap could lift Thor's hammer then decided not to. Especially liked the look on Thor's face when Cap started to move it and the smile that returned when he pretended he couldn't.