???? Warning: There are MASSIVE spoilers for Avengers: Endgame in this post, so proceed with caution.???? 11. Ken Jeong and Yvette Nicole Brown, who both starred on Community, appear as a security guard and a S.H.I.E.L.D. agent respectively. 25. When Hawkeye attacks the Chitauri after The Avengers headquarters collapses, the scene mirrors a similar moments from Alien.