Seriously i think it can reach 15 million, definetly it will reach 5 millions on both plattforms, i dont think 3ds and wii u sales really hurt each other. Its the other way around if you like it on wii u you might also play it on the go and if you ike it on the handheld you might want to play it in big.
Well i could be wrong though i never studied those things, thats just my expectation







