[@Lord Wraith]
Thank you for the quick response! 

The current state of things seems to work with my current plans. In regards to the wider world of X-Men, I was planning on keeping my pool of potential supporting characters small in scope anyway because I feel sticking my hands in too many pots wouldn't end well. (For reference I'm currently only considering really: Gambit, Jubilee, Caliban and maybe Honeybadger in the future. Beyond that maybe some potential X-Villains that might reasonably work with the Facility.) And the idea for the wider world would result more in offhand references to the X-Men or the original "Weapon X", but nothing too concrete to lock any potential player out of them. This is potentially my first kind of game like this after all, so I figured my best avenue for success would be a small and focused approach instead of trying to do something big and important like the X-Men or Batman or something.