2014 saw 1 of Nintendos biggest titles as Wii U only release and 1 of their biggest titles seeing a 3DS first release. And this second title isn't that big in Europe.
So Zelda should have a much bigger impact than Smash Bros., a possible price cut will have some impact, depending on how big it is, and there's a ton of other exclusives that might not be big hardware sellers themself but should keep interest up as a whole.
A Mario Maker might possibly push Wii U more than people think and there's other games as well that could have some effectt in one region or worldwide.
So yes, 2015 could be a better year than 2014, especially if Nintendo has one or two unanounced titles like this years Hyrule Warriors (announced Dec. 2013) and Captain Toad (E³ 2014).
It could as well be worse though, if they have delays again, no pricecut...







