He has moved over to DC, but will return to the X-Men universe, which is a Marvel comic property.
He also created Jessica Jones, who’s now one of the lone survivors of Marvel’s recent Netflix purging, along with The Punisher.
The role was played by Ellen Page in 2006’s X-Men: The Last Stand and 2014’s X-Men: Days of Future Past.
It’ll be interesting to see how Bendis will approach this project now that the X-Men will likely become part of the larger MCU since Disney acquired 20th Century Fox.