you people seem to forget that this is all working under disney now.hence the huge budget for avengers and a much bigger film then previous 5(hulk,iron man 1,2,captain,thor)
and seeing how disney lost a couple of big possible franchises-prince of persia,sorcerers apprentice ,john carter and you cant really make a sequels to alice in wonderland-i see them giving big money on marvel films.
that is why i think iron man 3 will be as twice as big as previous 2 in terms of action and locations around the world and thor 2 to be an even bigger film then avengers.
not to mention that avengers 2 idea from whedon to be a smaller ,personal film will never pass