Artist Sara Pichelli teased the following cover image of All-New X-Men #32 where we see Spider-Man Miles Morales looks to join the team.
Pichelli posted it on her Facebook adding:
SPECIAL PREVIEW: Black and White cover of All New X-Men #32... O_O !!!! -- this is not a fake
It's unknown how exactly Miles Morales will join the X-Men as he is the Ultimate Spider-Man version, but in Bendis' Spider-Men when Peter Parker visited the Ultimate Universe, a 616 version was hinted at.