For Tony, avenging all his fallen friends, and for Nebula. Gillan teased as much in interviews, telling Fandango that she has a “new BFF” in Endgame. “I can’t tell you [who it is].

Luckily the filmmakers have stepped in to shut this theory down and clear Nebula's name. On the commentary track for "Endgame," writer Stephen McFeeley clarified that Nebula had no idea about the ...