Guest Stars James Arnold Taylor voices Cosmo Travis Willingham voices Thor Troy Baker voices Loki Cree Summer voices Nebula James Arnold Taylor voices Yondu Logan Miller voices Sam Alexander / Nova Trevor Devall voices Fandral Fred Tatasciore voices Hulk Mick Wingert voices Iron Man Seth Green voices Howard the Duck Della Saba voices Kaelynn Kevin Shinick voices Bruce Banner Talon Warburton voices Tryco Troy Baker voices Hawkeye Talon Warburton voices Asgardian