Logan

While obviously not the actual finale to the X-Men movie franchise, an excellent cap to the original set of characters and their actors.  Jackman and Stewart bring a lot to their last outings as Wolverine and Proffesor X.  Stewart especially brings to mind his previous role as an super-spy suffering from Alzheimer's in Safe House (and yeesh, that was all the way back in '98).  And even if she doesn't return in a future X-property I hope Dafne Keen gets to expand on the promise she shows her as Laura/X-23.