Earth-606

Marvel Unleashed is an alternate reality version of Earth-616.

Fantastic Four Unleashed
A government group is sent along with Nick Fury, Agent of SHIELD, to track down a time-altering alien, Annihilus. While going after Annihilus, the four of them (Johnny Storm, Reed Richards, Sue Storm, Ben Grimm) are suddenly beamed by Annihilus to his world, the N-Zone, right when they go into the time machine, altering the molecules and ultimately destroying then recreating there DNA. Johnny's DNA has been effected by the heat between dimensions, allowing him to generate flames, Ben's DNA has hardened somehow and turned him into a rock-like monster, Reed's DNA has been stretched out, allowing him to stretch to any shape, size, or form, and Sue's DNA has been completely remade, allowing her too turn invisible and use the energy between dimensions to generate force-fields. They use the powers to help Nick Fury defeat Annihilus, and then they use Annihilus's transporter to beam themselves back to there reality.

Thor Unleashed
Thor, god of thunder, is battling the evil frost giant warrior, Ymir, and Ymir's henchman, Algrim. Thor is winning until Algrim uses his dark magic to transport Thor's life-force to Earth, erasing his memory and leaving him at his weakest. He starts a new life as Donald Blake, and finds a mystical hammer. When he picks it up, his memory comes back along with his power. He returns to Asgard, save it from Ymir and Algrim, and returns to Earth to protect it, using the fake name Donald Blake as his alter ego.