I think it's safe enough to assume that any third party series with any kind of sales expectations in Japan will come to NX. This is a region where current-gen handhelds have an install base of over 26 million compared to just over 6 million from current get consoles. The PS4 still hasn't overcome Wii U's install base after 2 and a half years on the market, and Wii U is a pretty damn low hurdle from that perspective. The NX will be the natural successor to the 3DS, Vita and Wii U, and if you're Capcom, Squeenix, Level 5, etc, and have a Japan focussed series it makes a lot more sense to climb on board with that than with PS4 (or they can just support both if they want to maximise sales outside of Japan too).