I expect both games to initially sell much better than SM3DW which has sold pretty well over the few weeks it has been out.
By end of 2014 SSB should easily do 3m on the Wii U from what I expect to be a 10m minimum userbase.
Based on that assumed userbase I would give MK 8 sales of around 3.5m - 4m in the same period.
As for lifetime sales I couldn't say.







