Well i dont think this is a bad thing. If i want to buy a ps4 it has to have a more Uncharted, more God of War, more Gran Turismo, more Sly racoon,more Ratchet and Clank.
New Ips are only the ice of the cake. So i dont think its a bad thing to satisfy the fans.
If this games will turn wii us fate is yet another question.
Sales wise the have released its biggest seller called Super Mario Brosd Wii U last christmas, so will a new 3d Mario game skyrocket Wii U sales or only convince the fans to buy the console is another question we cant answer yet.