The following post contains SPOILERS for Avengers: Infinity War, as previously indicated above by the words “spoiled” “the end” and “Avengers: Infinity War” in the headline above.
They start talking about Ruffalo’s role in the then-upcoming Thor: Ragnarok, and he starts joking around about what happens in the movie after that, meaning Avengers: Infinity War.
Marvel did an astonishingly good job keeping secret the major spoilers in the end of Avengers: Infinity War.
Watch the clip below from Good Morning America recorded at D23, the Disney fan convention, featuring Don Cheadle and Mark Ruffalo.