30 hours or so isn't impossible (although it is a bit far fetched), although I think by that point I'd be getting more than a little tired of Mario. 40+ hours of Pikmin is possible, although a good chunk of those hours would have to come from multiplayer modes (there's no way the single player campaign's going past 40).
For Mario Kart, expecting a game to be released with 40 tracks isn't too far fetched either. MK games usually have 32, and I wouldn't mind some more retro tracks getting remade. Perhaps a Rainbow Road Cup that could serve as a category exclusive to Rainbow Road tracks from older games (as well as this one's RR). Or Nintendo could go the DLC route, which I would be cool with as well. Start the game off with the standard 32 tracks, and sell 2 tracks for $5 or 1 track for $3. 40 tracks isn't out of reach by any means.
