I think its actually Special Cup 100cc.
So far Double Dash is better than I expected but not nearly as good as it should have been. The tracks are fun, but thats only because the core gameplay is fun (even that shitty oval track, Baby Park, is fun to race on). There should have been more 'going on'. Dino-Dino Jungle should have had dinosaurs all OVER the fucking place, in the sky, running around, whatever. It feels like something from Diddy Kong Racing as is. The Cruise Liner is a wasted idea, as is Toad City or whatever that course was called. It seems like every level is built around a single gimmik, and the rest of the map around it is kind of bleh...
The battle levels are a MAJOR dissapointment. They work well enough, but theres nothing like Block Fort or Double Decker. They are either too small (Block City), too weird (Cookie Land) or too fucking boring (Gamecube). I just unlocked Luigi's Mansion, and its kind of like a small version of Double Decker....so maybe that'll be ok. The last level you get is supposed to be pretty good too(?)
I like the new Special weapons (fireball, chain-chomp, bob-omb...all kickass), but items overall feel kind of ruined otherwise. Shells dont do as much damage as they used to (I used to feel like God with 3 red shells), and generally dont seem at all dangerous. Green shells cant be aimed as well, as they kind of fire off to the side instead of straight ahead (and why are the shells so fucking BIG??) Leader shells are useless now, since I dont think they can hit anyone on the way to the leader (used to be you could hit 3 or 4 people with that one).
2-People in a kart I have kinda mixed feelings about. Mostly its a cool idea, and introduces a fun element of strategy with item-management....but it also makes it needlessly complex. I've had little luck introducing people to the game, as they get frustrated with having to manage characters ("how do i know who has what, how do i know what item they have, blahblahblahblahblah")
I think Mario Kart 64 hit a perfect balance with being able to hold items on the back of your kart for defense (I fucking MISS my spinning shell-shield!!!) and another as a backup.
But I still like this game a LOT because its fucking MARIO KART! I'll enjoy it for a few years (or another 6...) and hope Nintendo tries a little harder next time.