I would buy a Wii U if this is a RPG and if it gets localized to U.S.
This will never get localized to the U.S.
As has been said previously in this thread, it was specifically shown in the NA Nintendo Direct. It's coming to the US.
The whole "Persona 5 for the 3DS" seems more and more likely now that Nintendo and Atlus seem to have a really good relationship.
You would think so but Nintendo getting DoA Dimensions didn't land them DoA5 and MGS3 3D (and Snake in Smash Bros.) didn't get them Metal Gear Rising.