As someone who's really hoping from a 3DS/Wii U version, I really don't understand all those "please let it be on ....-only, I wanna see the meltdown". Meltdowns are only fun 5 minutes, especially that one, since Atlus would really suffer from it. It's not like Monster Hunter, where the players will go pretty much anywhere the main series is. While I wouldn't exactly call Persona 'niche', it's still a franchise that heavily relies on an extremely loyal fanbase (just like all Atlus franchises, actually). P*ssing that fanbase by moving to a non-Sony platform would be near suicide.
Which is why I'm hoping for either multiplatform or Sony exclusive (even though that'd mean no P5 for me, not before a few years at the very least). But no Betrayalton, please... which was already confirmed by that japanese PS Blog post a few days ago anyway, so here's that.