Transformers Prime: The Strongest Human

In a universe where humans possess superpowers, a teen gets caught in the middle of a war. Using a universal portal, the young boy teleports into another version of earth. On this earth, humans didn't have powers. He looked down on them, but never revealed himself. He stayed hidden, robbing stores for food and clothing since he couldn't show himself openly. He had no money, no family, or anything. His name wasn't in any records, he never existed on this planet.

Eventually, an alien life form known as Cybertronians became known to the boy. And the day came that he would join yet another war.