1) X-Force
X-Force is still in the very early stages of development, but Logan is one of many movies which is no doubt helping to build towards it. Next up has to be Deadpool 2 (thanks to the introduction of Cable), while X-23 seems highly likely to return as a member of the team given her massive popularity, and the widespread critical acclaim Dafne Keen has been receiving.
In the comic books, Cable travels back in time from a future where mutants are struggling to survive and the events of Logan set the stage for that, considering the fact they’ve been all but wiped out. Throw in the Mister Sinister nods referenced throughout this article, and I wholeheartedly believe that Mangold’s film could be the first stage in a series of adventures which will take place in the near future, as Cable assembles a team of his own to do the jobs the X-Men are no longer around to deal with.
Even if that theory is way off, there’s no way Fox will miss out on adding X-23 to the roster of this beloved group.