Totally didn't expect to see ALL the koopalings as new playable karters... great additions actually, though from now on we won't see many more new characters (many will likely complain about this I'm sure).
The new tracks shown looked absolutely fantastic, especially the futuristic one, and the other one in the jungle with the rideable waterwall ! I dig what they did to GBA Mario Circuit, nice twist with the part of the track that is lifted upwards, and overall looks great.
Wished we could see some little details about online, but finally a precise release date... HYPE !