Soundwave on 18 November 2014
4DS/Fusion is the Wii U successor.
Nintendo won't have seperate software ecosystems (meaning SNES/GB, N64/GBC, GCN/GBA, Wii/DS, Wii U/3DS type split) going forward, so the "next" Nintendo generation begins when the 3DS successor arrives. Probably in 2016.
That will be where you play Mario Kart 9, Mario Galaxy 3, Animal Crossing Next, etc. ... you'll just have the option of buying the portable or home variant or both. But they will have the same games.
