During a chaotic battle with Klaw & Screaming Mimi, a fractal's cosmic power turns the Hulk into the Gray Hulk.

When the Skrulls start invading the city, the Super Hero Squad must team up with the Fantastic Four to stop them. Meanwhile, Thanos forms an alliance with Dr. Doom so he can steal an alien artifact from the Baxter Building.

War Machine teams up with Iron Man when Doctor Doom, Crimson Dynamo, and Melter band together in a plot to eliminate Iron Man. Meanwhile, Wolverine and Reptil face off against Abomination and M.O.D.O.K. in a game of golf.

Dr. Doom conquers Chthon's mystical dimension to free his mother Coco Von Doom. Though Doom ends up with Chthon's evil powers, he also finds himself dealing with his mother's monstrous nagging.

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 while the Invisible Woman is forced to broadcast the god-challenge to Superhero City to raise money for the Mayor.

After stealing the Space Gem from Thanos, Nebula seizes the teliporter of the Helicarrier to get away, but sucks herself, as well as H.E.R.B.I.E. and Wolverine, into the Negative Zone where Annihilus attacks them thinking they're after his Cosmic Control Rod.

An army of Wolverine clones invade Super Hero City, forcing the real Wolverine and Reptil to get to the source with help of Firestar. Outside of the other Super Hero Squad members rounding up the Wolverine clones, Reptil is unaware that his science fair partner and Firestar are one person.

After being thrown into a portal by Dark Surfer, Wolverine winds up on a world populated mainly by dinosaurs and encounters the High Evolutionary who asks him to help with a particular dinosaur named Devil Dinosaur in exchange that he helps to get Wolverine back to Earth.

After being thrown into a portal by Dark Surfer, Scarlet Witch ends up in the Marvel 1602 universe where she finds a town under attack by pirate versions of Doctor Doom, MODOK, and Abomination. Unfortunately for Scarlet Witch, the townspeople do not appreciate witches.

When the Impossible Man’s wife kicks him out, the irrepressible funster ends up crashing with the Super Hero Squad. But to save his marriage, Impossible Man attempts to do something no one else has been able to do – defeat the Dark Surfer.

The Super Hero Squad suffers a time mishap that transforms several of the Squaddies into toddlers! It’s up to the unaffected heroes to find a way to fix the Super Hero Toddlers before they are stuck that way forever.

After being thrown into a portal by Dark Surfer, Falcon and H.E.R.B.I.E. find themselves in an alternate reality where Scarlet Witch is an evil emperor who rules the world. With help from an elderly Magneto and a strong Reptil, Falcon and H.E.R.B.I.E. try to convince Scarlet Witch that she is good and let the world be in peace.