Mario definitely needs to be split into subfranchises, for one. I'd say 2D Mario and MK stay in S tier, 3D Mario and Mario Party go to A tier and Paper Mario to B tier.
Also, SSB needs to go down a tier. It sells well, but it has only one 10m+ title that's barely above that point and it'll probably never manage that on a smaller userbase. AC is definitely a better candidate for S tier. The DS game managed it and the 3DS game is very likely to do the same. Plus, Zelda isn't A tier material, given it has only 1 5m+ title in the past 15 years and the most recent one, SS, ain't coming close to it. Probably more, but that's all I can think of at the moment.
“These are my principles; if you don’t like them, I have others.” – Groucho Marx