Paper Mario hasn't really been particularly good since TTYD, so I'm...not hopeful, truthfully. I like the concept, and I have no doubt that it'll be charming in the way of previous Paper Mario games, but whether it'll actually be playable is another matter entirely. Honestly the most excitement I got out of this was the blatant Metroid reference at the end...excitement which was then immediately blunted when I remembered that Other M existed and they could be hinting at a remaster of that or, god forbid, another game similar to that.
But just...keep it simple, please. It ain't broke, so don't fix it. I'd prefer they not go out of their way to create new gimmicks that don't work...we get enough of that kind of rubbish with Pokemon.