Idk it kind of depends on what Retro is making for me.
If it is online heavy or multiplayer heavy, I'm probably not going to be enthused. I don't know people who'd play Kart with me or even Smash these days. I don't particularly like online games.
If it is Donkey Country Returns 3, I'll be happy, modestly so. I'll enjoy the game a lot when I get it, but it won't be a "hype" announcement for me. I like 2D platformers, I'll want the Switch to have good ones some day, but they don't occupy a lot of my mindshare generally and, coming off Wii U, even less these days.
If it is Metroid Prime 4...even in the least "Metroid" days of Prime, there was always a lot of good Metroid moments. Prime 2 and 3 both have structural issues, imo, but they both also have pretty damn good moment-to-moment Metroid gameplay.
If it is the Prime 4 Tanabe has been discussing...I'll probably not like the tone or expanded universe content of the game. It was bad in 3. It was bad in Hunters. And that's what Tanabe seems to be interested in, with respect to Metroid. Way too much sunday morning cartoon, way too little moody science fiction. But if the game looks good, I'll grin and bear it.
If it is a new IP...it is going to matter to me what sort of new IP. Again, I'm wanting some single player content from Retro. I'd like it to be action/adventure. I'd like it to look cool to me. Etc.