RDJ went on Ellen and said "Yes". Then he went on Letterman and said "Well not IM4, but stuff."
Apparently he is working out a new deal with Marvel that will extend the number of films he'll be doing for them (currently he owes them 2 more).
“Activism is a way for useless people to feel important, even if the consequences of their activism are counterproductive for those they claim to be helping and damaging to the fabric of society as a whole.” - Dr Thomas Sowell