This isn’t something I was aware of but it seems that there is a running joke amidst the Russo Brothers’ Captain America films in relation to the comedy Community.
The directors, who used to be producers on the show and even directed a large number of episodes, have inserted a special cameo with an actor from the series into both The Winter Soldier and Civil War. Danny Pudi appeared in the former as a S.H.I.E.L.D. com tech while Jim Rash made a brief appearance in Civil War as an MIT liaison.
The good news is that these cameos will continue into The Avengers: Infinity War.
“We’re literally in that phase of the pre-production where we start thinking about those kinds of things, and right now we’re looking for the right part to see who’s a match for the next cameo,” the brothers told Cinema Blend.
Pressed on whether fans can expect a special appearance from a Community actor in the 2018 blockbuster, Joe Russo added: “Yeah, absolutely. We’ve got to keep the streak going.”
Source: Cinema Blend