Well Dragon Quest XI is coming the Switch so this isn't shocking. I think FFVII remake is quite likely, XV less so. Mainly cause - iirc - XV is built on an engine that has been a long time problem child for Square and I think they really just want to finish that game, put it out, take their money home in a shipping container, and then never touch that engine again if possible. FFVII - again, if I remember correctly - is built on more stable, recently made tech and would not only be more likely to run well on the Switch but more importantly is early enough in development to slot the Switch in without much trouble while XV is almost here. Unless XV has had a Switch version for a while and they've kept it quiet, which I doubt.
Another possibility would be a Bravely console game with graphics very similar to the Bravely Second cutscenes as a Switch exclusive, could be very cool.
Edit: Although if their event in January showed XV, VII Remake, Dragon Quest XI, AND something exclusive...dang, the internet might just implode.
