[quote=@vancexentan]
What about aspects of each franchise? Do we just ban the force, or mutant powers from X-man? Because they're still going to get magic, and assess to fantasy stuff by virtue of their key weapons.
[/quote]

It's almost like they aren't thematically appropriate or something! I kid, I kid.

But in all seriousness, I'm all for making Disney and FF more relevant (especially the latter, given the abysmal treatment it got in 3), but come one who doesn't love Aqua and Ventus? And... it's kind of hard to tell a very compelling story when you have characters like Goofy and Genie yucking it up alongside Cloud Strife's stonefaced angst. I'm guessing that's why the Organization stuff ended up being as popular as it was... consistency in its tone?

So my suggestion is thus: Maybe go in an Epic Mickey style of direction? Something dark and scary is encroaching on the worlds and draining the life and color from them and so you get a consistently dark tone upon initially visiting worlds but get to see them as they are meant to be once they've actually cleansed or saved or whatever.