I mean at first glance this looked like MK8, but there's 2 things I noticed

+King Boo is playable (He's not in MK8 I think)

+2 powerups at once

Having trouble uploading the screenshot... but look at the reveal at 1:46

Could also just be extra stuff in the NX version of mk8. Hard to tell though but it looks really close to the WiiU version to make seem like MK9. Unless the power of the NX isn't actually that much more

I see, is probably MK8.5, packed with all DLC and a third DLC wave.
I wonder if this content is also going to wii U version. switch-wii U crossplataform multi online would be nice, certainly.

Carrying an extra powerup seems like it would change the balance of the game though. By the time they'd release this - it will have been 2 years since the last DLC pack...

Feels like they're making an new mario kart with mk8's engine.

I highly doubt that it's a completely brand new Mario Kart. The interface is practically the same as MK8, not to mention the fact that the track they played on was a DLC track from said game.

I'm betting on an enhanced port.

I doubt that. It's yoshi's circuit. If they are making a new retro coup, they would be remaking some old courses that were left behind in MK8

Mario Kart 8 and a half

I'm pretty sure it's a port withe new features

Same with Splatoon

I am guessing mario kart 8.5 but that's a good thing. Especially since you can play some Mario Kart right from the start on your Nintendo console. It's a bit like Driveclub VR an older game remade to use newer hardware (PS4 pro and PSVR in DC is case) and MK8.5 in Nintendo Shift its case.

They are gonna sell it as a new MK game, but I bet its gonna have the same engine, graphics and even characters/courses of MK8, plus a few new ones to make a distinction.