Is it bad I'm more excited for the Octo Expansion DLC than Smash 4 Switch itself? I mean, don't get me wrong, this is a pretty impressive reveal, but I'm not much of a Smash player.
That said, I'm predicting that Smash will have an emphasis on a tag mechanic, perhaps like Pokemon Trainer meets Marvel vs. Capcom. I'm not sure if that'd work well, but given Nintendo's current MO is to innovate the crap out of their franchises now, it wouldn't surprise me.
Then again I'd be perfectly fine with it just being a port of Smash 4. That game is huge and I'm sure Wii U/3DS owners would appreciate having a Switch version. Just add in a story mode with less crappy level design and we're good. :V