Guest Stars James Arnold Taylor voices Cosmo Cree Summer voices Nebula James Arnold Taylor voices Yondu Troy Baker voices Loki Logan Miller voices Sam Alexander / Nova Fred Tatasciore voices Hulk Mick Wingert voices Iron Man Seth Green voices Howard the Duck Trevor Devall voices Father Fred Tatasciore voices Son Troy Baker voices Ultroid #3 Kevin Michael Richardson voices Ultroid #1 Will Friedle voices Ultroid #2