^ From what I gathered out of some reviews, it's a kind of bar/n fight extravaganca of Team CA vs Team IM in regards to bring home the point as to who is right in being (randomly) pro or contra putting of the Avengers under government control? But of course they won't really kill each other over it despite the impressive firepower and force at their disposure. Ehm, is that and if so, what's the point?
Mind you, haven't seen it yet.
The 'big blue' was very entertaining and surprising in terms of both story and marketing. But it was in context to the broader story arc of the film.