You may hate the blue (spiny) shell in this franchise, but you might change your tune with the limited edition of Mario Kart 8 for Wii U. This special edition (so far, only confirmed for Europe) of the game comes with a special "blue" Spiny Shell collector's item.
There's no word on how the blue shell will react in Mario Kart 8, but if it's anything like previous iterations, victims of this spiny power-up will be cursing up a storm. Nintendo is no doubt banking on this newest iteration of Mario Kart to bring up sales of the Wii U, which have been reported as weak for some time now.
Mario Kart 8 is "on track" for release in the UK on May 30th, 2014.