It's not outside the realm of possibility, but i wouldn't bet on it right now. If ATLUS wanted the mainline Person series on a Nintendo platform, you'd think P4G would have made its way to the 3DS years ago, or the original to the Wii. They're both capable of running it without any in-game compromises, so you have to wonder why they never did. ATLUS themselves have no problems making games for both Sony and Nintendo platforms, so i wonder if Sony have some kind of deal with them for numbered Persona entries. That, or ATLUS just can't be bothered