This right here should be the end of the thread....
Jack Frost isn't only belonging to Persona 4. It's been a concept since Shin Megami Tensei, which has existed before the P4 protags were even born. If you want personas, you mean you really want Demons. Featuring Dante from the Devil May Cry series.
But of course no one remembers SMT because it's not bad anime trope city.
I just want Tokyo team back. I’m so sick and tired of Osaka team’s strange gameplay mechanics...
No idea what classes Xemnas, Saix, Demyx, Luxord, and Marluxia's weapons would correlate to, but I'd be down for getting Axel's chakrams as a Dancer glamour.
Honestly given how litigious Disney is and the amount of control they have over KH I would not blame the FFXIV development team for wanting nothing to do with any kind of cross over. The last thing you want is to let the proverbial and not so proverbial mouse have an 'in' on your biggest money maker. Because knowing Disney they'd definitely do something shady to maximize the benefit they get out of any more collaborations.