Massively wrong take. There will always be a crossover of weebs, Disney dorks and final fantasy heads. It’s perpetual engine that will continue into eternity.
The thing about Kingdom Hearts is that if you didn't get on the train in the 00's, then you simply are left behind. It is too corny to work without the context of operating in a world of myspace-era truthisms, and its thrills can be found in other franchises with less homework.