Well, as expected, there will be another Community cameo in Avengers: Endgame with Ken Jeong in an undisclosed role.
For those unaware, Joe and Anthony Russo directed episodes of the TV series Community before directing Captain America: The Winter Soldier. Since that movie, they have had Community alum cameos in two of their previous movies. So far they’ve had Danny Pudi playing a S.H.I.E.L.D. technician in Captain America: The Winter Soldier, Jim Rash as an MIT liaison in Captain America: Civil War, and while not a Community cameo, they did have a blue Tobias Fünke from Arrested Development in one of The Collector’s cages.
Now, for the surprise character return mentioned in the title of this article. Be warned this is a potentially huge spoiler for Avengers: Endgame.
It looks like Rene Russo will return as Queen Frigga, but we don’t have any context for that return. So, for all we know, it could simply be a flashback from Thor or an illusion created by Thanos. Another likely possibility is that this further supports the potential time traveling aspect of Avengers: Endgame. Until we find out more, there are endless possibilities for her return.