To correct you a bit on Super Smash Bros., Melee sold 7 million on GameCube and SSB64 sold 5 million on the N64. It sold generally in line with the sales of 3D Mario. The Wii's expanded audience had relatively little effect on SSB's fanbase. It's more 2D Mario and Mario Kart that may be affected by the lack of the Wii's expanded audience. As for why we are getting 3D World instead of Galaxy 3, 3D World outsold both Mario Kart and 2D Mario on the 3DS, which means it might be something people will more likely buy than Galaxy 3. There is some method to Nintendo's madness, though even I am debating on just getting a 3DS over the Wii U since it's getting Smash Bros in addition to Mario Kart now.