I'd hope not. Such a Mario Kart game, which might be the last one in the main series, would focus heavily on extremely aggressive racing/battling (only overpowered items would appear, and at a frequent basis), bringing back every single racer, track, and mode from previous iterations (barring arcade and mobile games). This sounds like a good idea, but it'd be nasty and overflowed. However, because I can't speak for Nintendo, I'm afraid that this is what the next Mario Kart will be like.