A.C. Bradley Creator, Executive Producer, Writer Jeffrey Wright The Watcher Voice Mick Wingert Tony Stark, Iron Man Guest Voice Jeff Goldblum Grandmaster Guest Voice Tessa Thompson Valkyrie Guest Voice Taika Waititi Korg Guest Voice Rachel House Topaz Guest Voice Josh Brolin Thanos Guest Voice Brad Winderbaum Executive Producer Kevin Feige Executive Producer Bryan Andrews Executive Producer, Director Victoria Alonso Executive Producer Louis D'Esposito Executive Producer