If it goes console, most likely they won't bother with older xbox, playstation 99% won't be getting one.
And you got that backwards, they dont have to make it compatible with controller. Which is kinda moot point since you can play on PC with dancin mat
https://www.youtube.com/watch?v=TnxCfhSdWPc
It should be pretty easy to grab some more money even if there won't be much new players, kinda like classic, little time investment for potential profit.