I already have a Wii U, but I did buy it in preparation for Mario Kart VIII. Mario Kart Wii is my fave game for that system and one of all time, and plus with the online shutting down in MKWii then I have to switch to a new online Mario Kart. The only reason I bought early though was from winning money at a casino, else I'd have waited and bought the MK bundle. I figured it was a good idea to get it when I had the extra cash and play the few other games I wanted in the mean time.
I do have feelings of regret sometimes, but hopefully that'll stop after the game finally gets here.