I definitely expect the Joycons to play the biggest role overall in a new Warioware title for the Switch
The HD rumble, the more advanced gyros, the fact that they're practically tiny controllers that you can give to your friends, there's a lot of potential for a new Warioware just with the joycons alone.
As for the answer though?
No one knows and the chances of us getting a new Warioware is pretty slim overall.
however ever since 1. 2. Switch got revealed, I have been noticing a lot more demand for a new Warioware title, and Nintendo still does new stuff with the series. (Even if it's in the form of Ashley most of the time.) So Nintendo clearly hasn't forgotten about it unlike other unlucky series', So I can see it happening eventually. Just......Maybe