The universe's most powerful cabal of villainy has formed right under the Earth's Mightiest Heroes' noses--and they never noticed! This group of fowl (get it!) villains, is the Pets of Evil Masters! And they're after world domination! Rocket must team-up with The Pet Avengers (much to his dismay) to face down the foes that no one else can (or will bother with) in this Earth-Shattering adventure that can only be told in the Mighty Marvel Manner!