This is incredibly interesting. A third party franchise new to WayForward being shown off in a Nintendo presentation. There is so much that makes this weird. So being shown off by Nintendo doesn't exactly mean exclusive, but it strongly leans that way, which is weird because if it's third party, why wouldn't they want to put it on other platforms?
I want to assume that this "franchise" isn't a gaming franchise, since if that third party was releasing a game you think they would just make it themselves. The only way I could see this being another gaming IP is if it's one that the respective company doesn't care much about. Perhaps I'm being hopeful, but maybe we could finally be getting a new Adventure Island? I mean, Konami hasn't really cared about any of the Hudson Soft properties (aside from Bomberman) since the acquired them.
Still I feel that a licensed game from a non gaming IP is more likely. And that makes sense since WF are kings of making actually good licensed games. From experience I can say that Duck Amuck on the DS, their Ninja Turtle game on the 3DS, the First Adventure Time Game on the 3DS and Goosebumps on the Switch are all far above the quality of most games made on non gaming properties. And lets of course not forget Mummy Demastered.
Either way, at least we don't have to wait long to find out.