WiiU has the most ratio of Players per console of any console. 7,9% of WiiU players have Disney Infinity 3.0. It's huge, i don't think they will drop the WiiU after a while,
it's one of main consoles after all, even if it seems a bit behind, the WiiU will stay as long as the PS3 and Xbox 360 are there too.
And since the Xbox 360 is the most successful one and that PS3 and 360 will stay for a while (seeing how difficult it still is for a lot of people to convert to next-gen),
I don't believe the WiiU will get the same treatment for 3.0 at least.