Jealous of the actions of Thor on Earth, Greek god Zeus challenges Odin to a battle between the god of Thunder and his son Hercules. Reptil sneaks along to help Thor out. Meanwhile, the Mayor of Super Hero City sends Invisible Woman to secretly broadcast the challenge for all of Super Hero City to see.

Thanos has the Space Gem stolen from him by his older sister Nebula. She uses the Squad Helicarrier's Teleporter to escape, but ends up in the Negative Zone. Wolverine and H.E.R.B.I.E. team up as they were the only ones aboard the Helicarrier at the time. Having just returned from a trip to Six Eggs Over Easy amusement park, Iron Man & Falcon venture into the Zone to save them.