zygote on 18 July 2017
I agree with when the new smash comes out, but why would they make a completely new smash? The Wii U version is a wonderful base to bundle together assets. I predict that Switch Smash is going to be the definitive version of Smash Brothers. They will bundle updated resolution versions of all features, stages, and play modes from other versions. There may be a new single player mode and a few new characters or promise of new ones later.
