I kinda have to agree with D that this was a filler movie, but it's ok as it was entertaining. Some of the plot points seemed forced (including the Widow/Hulk romance, which I didn't mind as much as others) and it wasn't as good as the first Avengers movie, but I liked the new characters and most of the action.

And of course, any movie was going to feel like too much filler to me, as I've been looking forward to Thanos ever since the first Avengers end-credit scene. I don't think I've ever been this excited for a movie this far in advance.