Xenoblade X is this year's Bayonetta 2 ... a game with a lot of hype from Nintendo fans and will get great reviews but won't do sh*t to boost hardware sales.
I think Splatoon is this year's Pikmin 3/DKC: Tropical Freeze.
Nintendo fans betting on these two games to cause a large hardware boost for Wii U are going to be sorely disappointed I think.
That said ... Vita long term is in even worse shape than Wii U.