WARNING: The following contains spoilers for Avengers: Endgame, in theaters now. 1 / 8
Avengers: Endgame co-director Joe Russo has opened up regarding one of the film's subtlest cameos. 2 / 8
During the fallen heroes' return, Howard the Duck can be spotted in the background. 3 / 8
Russo explained that the cameo was added towards the very end of post-production. 4 / 8
Howard the Duck is infamous for his 1986 solo film being a critical and commercial disaster. 5 / 8
The character has gone on to make several cameos in the Marvel Cinematic Universe. 6 / 8
Howard apparently wielded a machine gun in the final battle against Thanos 7 / 8
A Howard the Duck animated series is also currently in the works at Hulu. 8 / 8