Spider-Man has the built in audience who would help to increase sales of Aaron's Mighty Avengers by 20%. Those Spider-Readers would get to know the whole cast because Spidey is a member of the team, led by Carol Danvers. Everything has to have a starting point. One can say that Deadpool and Wolverine should have nothing to do with Peter. Yet their partnership sells. The same can apply towards Spider-Man x She-Hulk. There is a huge story and marketing potential with She-Hulk x Spider-Man working as close allies. When it comes to $$$, that's all Marvel/Disney care about...