Platinum Games's Japanese Twitter account made a tweet containing the above image. It shows off Bayonetta in her two looks from 1 and 2. As far as Bayonetta images go, this is rather tame, so why are Bayo-fans getting exciting? The blue and red backgrounds of the two halves could be hinting at a Switch port. How? Because the left and right Joy-Cons on the Switch are blue and red (when they're not just grey). The horizontal split also creates two spaces with similar shapes to the Joy-Cons.
It's not much to go on, certainly, but fans are so hopeful that it's become enough. Nintendo has shown they are willing to port Wii U games over to the Switch, so a move like this isn't without precedent. Is this enough to sound the clarion call for Bayo-fans to go out and buy a Switch? No, but it's nice to dream.