The Avengers Endgame Encore post credit scene revealed that Doctor Doom took Bruce Banner. So does that mean Hulk is joining Doctor Doom? Not exactly. I don’t think Bruce is joining Doom. Rather, Doom is offering Bruce something he can’t refuse. #avengersendgame #avengersdoomsday #hulk #doctordoom #marvel Avengers Endgame Encore post credit scenes explained.