Mhh......................... your arguments abou what makes "sense" in a fantasy world are not very solid

Anyway, what if, flavor wise, we are not the ones going there but the other FF chars comming to Vanadiel via "invitation" by shantoto or promathia or whatever.

Im no writer and I would let the tibids of "making sense" in the hands of SE (as if I would directly influence them) and Dissidia and KH being the only crossovers doesnt have to exclude all others.

Its all arbitrary, it has as many reasons why it could and could not be, but excluding cuz Dissidia is Dissidia just because I named the thread like that is no argument, I could just name the thread "make cameo aperances of other FF chars in FFXI as battlefields" but dissidia as an starting example was what I went for, not that I want FFXI to turn into FF Dissidia Online (tho that would be a good idea as a new MMO like DC universe or something.. but lets not derail)