According to The Hollywood Reporter, Bendis and Miller will be working together on the project codenamed 143, which will be set in the X-Men universe. Director Tim Miller didn't always see eye-to-eye with writers/producers Rhett Reese and Paul Wernick and star Ryan Reynolds, so when it came time to announce Deadpool 2 Miller stepped away.
What's incredibly interesting is that this story goes against the standard template that the X-Men films use - an ensemble cast of multiple characters. It's also one of the very first comics I ever owned as a wee little one. This Kitty Pryde solo movie will be a return for Bendis, who was also part of the Marvel Creative Committee that advised Marvel Studios' output through 2015, to characters in the X-Men universe. Meanwhile, Oscar-nominated helmer Miller is now in pre-production on the latest installment of the "Terminator" franchise for Paramount and Fox, with James Cameron god-fathering the project.
Bendis' involvement is big news in itself. It's worth noting that Fox is the rights holder to the Alien franchise. He's now planning Superman comics for DC. Uncanny X-Men #143 was Kitty Pryde's first solo adventure issue, in which she squared off against a N'Garai demon who invaded the X-Mansion while she was home alone. The comic was created by Chris Claremont and John Byrne in their acclaimed run.
While it would work as a holiday-themed horror project that could work with a low budget, it seems unlikely given the somewhat experimental release of The New Mutants is still on the docket. Brian Michael Bendis is attached to write the script. Miller's Deadpool ended up becoming the highest grossing X-Men film ever. All of these are in development as the looming deal with Disney works its way through regulators before the sale is finalized.