Earth-606

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

Comics

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.

Spider-Man Unleashed

Adrian Tombes, C.E.O. of Oscorp after the mysterious "death" of Norman Osborn, is working on an anti-aging formula that also enhances strength. He calls it the Infinity Formula and tests it on a spider. It goes wrong and results in a hulked-out spider, about the size of a shoe, that is glowing green. The spider escapes and crawls through the city. It finds Peter Parker, a kid at his school's football game. It bites Peter on the foot, and he passes out. He wakes up at home, and discovers he has enhanced agility, strength, and can crawl on walls. He decides to join the football team to impress his crush, Felicia Hardy. One night he is attacked by a mugger. He punches the mugger, who runs off. He spends the rest of the night hunting down the mugger, but doesn't find him. He gets home late, and his Uncle Ben gives him a lecture about how with great power comes great responsibility. Peter runs off and spends most of thr night walking around town. When he goes to get something to eat at a mini-mart, he sees Uncle Ben walk in looking for him. Peter avoids getting caught and runs out through the back door. Suddenly, he sees the mugger who ambushed him earlier enter the store. Peter looks through the window and sees the mugger rob the place. Uncle Ben tries to stop the mugger, but gets shot. Peter decides to use his powers to find the mugger and avenge his uncle, now knowing with great power comes reat responsibility. He designs a device called a web-shooter and makes a costume to protect his identity as he goes to stop the mugger. Meanwhile, Adrian Tombes is fed up and tests the Infinity Formula on himself. Hr is horribly effected by it and becomes a green, super-strong beast with bat-like wings. He is uncontrollable and flies out the window, wreaking havoc on the city. He is nicknamed "The Vulture" by locals, and Spider-Man goes after him. Spider-Man meets Vulture on top of the Oscorp building. They fight, and Vulture is suddenly shot at by a helicopter. Spidey tries to tell them that he's just a human who was turned into a monster, and they shouldn't kill him. However, it is too late, and Vulture is shot in the wing, and stumbles backwards off the building, turning to human form as he falls. Peter finds out who Vulture really is, and tries to web onto him, but the web snaps and Adrian falls into the sewers. Later that night, air bubbles come up from the sewer water, hinting at his return.

Hulk Unleashed

Bruce Banner, a scientist, is helping the government by working on a new super soldier formula. General Ross and Samuel Sterns are the first to test it out. However, too much gamma in it results in Samuel's brain growing to a ridiculous size, making him so intelligent he thinks he was meant to be the rightful ruler of mankind, and turning General Ross into a giant, hulking, red beast. Samuel calls himself The Leader and makes Ross his new minion. Leader calls Ross Rulk, a combo of the words red and hulking. Bruce figures somebody has to stop them from taking over mankind, and injects himself with the formula, becoming a giant, green beast. Leader starts reffering to Banner as Hulk, for he is the opposite of Rulk. Hulk goes to the Leader's base, The Empire State Building, and takes out his "Riot Squad", a group of hulked out soldiers. Hulk finally gets to the top and fights Rulk, and evetnually throws him out the window. Hulk then grabs the Leader, and throws him out the window, too. He jumps out the window and lands right in front of them, passing out and reverting back to Banner. Nobody ever finds out that Ross is the Rulk, so when Rulk becoems Ross again he convinces the public that Hulk is a menace, and Banner starts his life as an outlaw.