Originally Posted by GRangerPrimeNYC
Hmm, I think we can say that his condition, changing into the Hulk every now and then, has an effect on Banner's normal appearence. His condition takes a toll on him physically over time.
I can't imagine changing into the Hulk doesn't have an effect.
That can explain how he went from looking like Edward Norton to Mark Ruffalo during a span of a year after the events of TIH.
I couldn't recognize him in the IM3 post credits scene tbh xD
I highly doubt the Norton to Ruffalo theory is canon. How would SHIELD keep track of him if his face keeps changing? Also if it was true then there would have to be an explanation to why Rhodey looked different in the first Iron Man movie.