From the introduction:
Welcome Jumper to another amazing world located in the Marvel Multiverse, Earth-1204. Here many of the characters you have come to expect from Marvel exist, but in some ways, very different forms. The Avengers having spent some time together originally before deciding to go their separate ways only to reform after the Red Skull reappeared and captured Captain America, and eventually the Hulk will become smarter and make his own team of gamma mutated beings. More important to you jumper is that 15-year-old Peter Parker, having spent a year as the amazing spider-man, has been approached by Nick Fury to learn how to be the best superhero he can be. Taking on this challenge as a quest to become “the Ultimate Spider-Man”, Peter has joined a team of young superhero trainees under S.H.I.E.L.D.’s tutelage. Which, if history unfolds as it should, will result in him being a central force in the creation of the S.H.I.E.L.D. Academy for young superheroes, and Spider-Man will eventually come to be leading both the Academy and S.H.I.E.L.D. itself. However, there is time for that to change, as you are now ready to enter this familiar if somewhat different world.