Its difficult to predict at this point.
Theres so much baggage behind the Nintendo and Wii U hate that i dont think it is recoverable. Mario Kart will no doubt move alot of units though.
Personally, i think its a good system. It has a great line-up of exclusives. Better than the PS4 and X1 for me, wich basically have nothing coming that interest me this year. FFXV wont make a release this year most probably so thats a shame.
Leaves me with Dragon Age 3, wich will release on current gen aswell. At least the Wii U has X coming out this year, and that by itself is worth a console purchase. Add to that those popular Nintendo games and Bayonetta 2 and the question becomes not wether its worth having, but what does the future hold besides Zelda.
Without the 3rd party support, wich we know Nintendo never has, it will always be a secondary system. A really good one, but nevertheless.
