From the introduction:
“Then there came a day unlike any other, when Earth’s mightiest heroes found themselves united against a common threat. On that day, they became the Avengers!”
Welcome, Jumper, to Earth-8096. A world not too dissimilar from the main Marvel universe, with the main difference being a more modern setting and how late the Avengers actually “assemble”. Of course, this means the main Marvel mainstays are here; the Avengers, of course, as well as Mutants, evil alien empires, gods, magic, monsters, earth-shattering cosmic threats, as well as much more. You will start out a day before the events of the first episode of The Avengers: Earth’s Mightiest Heroes.