Athe Vortex Clan in Marvel

Zhou Jiawen, carrying his newly created Naruto character template, traveled to the Marvel Universe. He possessed the Rinnegan (Samsara Eye), the Uzumaki clan's sage body, and a vast array of ninjutsu. And tens of millions of unused gold coins from the game's arcade. Well, I guess this is a pretty good start. But why is this Marvel Universe so different from the one I know? Spider-Man has the Venom symbiote, and Captain America starts the game wielding Thor's hammer... There's definitely something wrong with this world!