Iron Man 3 or The Avengers? Which will win in total life time Box office gross? Just passed Skyfall!

[Gamerace]

Iron Man 3 is guaranteed to finish over 1b ww.
But I doubt it'll beat Avengers. As much as I like IM3, Avengers was more epic, more fun and was the first time anyone has seen a bunch of seperate movies merge into one collasal one. But IM3 will benefit greatly from Avenger's success and come fairly close.