Could Robert Downey Jr. appear in 'Captain America 3'? That's the word going around and if true, it would make sense to what Downey said the other day about "plenty of fun stuff to happen [with Marvel]". According to Variety, Robert Downey Jr. is close to sign a deal with Marvel to co-star in 'Captain America 3'. Just remember, this is not official or confirmed from Marvel Studios. Source: Collider | |