Previous Greatness: Legendary status in the games of baseball, basketball, football and track.
Did athletes such as Reggie Jackson, Jackie Joyner-Kersee and Larry Bird deserve to have their names sullied for such a one-note, non-funny premise? (Look, all the aliens are named after sports stars! That kid is named Dick Butkus! Hilarious!) Then again, unlike the actors forced to sell this stuff, the athletes don't actually have to show up.
Photo Credits: Jason Merritt/Getty Images; Sonja Flemming, CBS; Kevin Mazur, Getty Images for TNT; Michael Gladis; HBO; Gabe Ginsberg, WireImage; Frazer Harrison/Getty Images; Jenny Anderson/WireImage; Paul Archuleta, FilmMagic; Dan MacMedan, Getty Images