Nintendo may have closed the doors on its first mobile game but it is opening a very big one in its stead. The gaming giant has just announced the title of its next smartphone game and its, for the second time, banking on the Italian plumber to carry the company forward. This time, though, he'll be doing it on wheels. Yes, Mario Kart is coming, in some form, to mobile. But that isn't the only Mario news Nintendo has for fans.