"If that opportunity ever came up to make Bayonetta 3"
That's the key. As far as I know, Sega still owns the IP. That means the decision would have to either come from Sega or Platinum would have to find outside funding once more with Sega's approval.
Would the sales of Bayonetta 2 change Sega's mind about the franchise? Hard to imagine.
Would Nintendo want to fund another Bayonetta? Perhaps. That being said, my own belief is that they got a very sweet deal with Bayonetta 2 because a lot of the work had already been done. I think Sega just wanted to get something out of what they had already invested and Nintendo likely wasn't on the hook for the full cost of the game.
What about Sony/Microsoft? Hard to imagine Microsoft going back to Platinum but it's possible. Sony would probably want to own the IP, so that might be out.
The game might get made but it looks like it has a lot of hurdles to clear.
