Reggie called out Splatoon by name as an IP that could push the userbase. I think NOA will find the guts and the cash to market it.
Mario Maker is a tricky one to position. It's really something aimed at lifeflong Mario diehards. However, given that older Mario VC titles sell better than a large number of other WiiU games, there's undoubtedly a lot of potential there.
I predict NX launches in 2017 - not 2016