No, I don't think it will beat the GC's lifetime sale. And accepting this will make me less disappointed throughout this generation.
If I had to guess Wii U's lifetime sales it would be...
2014: 9 million
2015: 12 million
2016: 14.5 million
2017: 16 million
This is if 1. Smash Bros. and Mario Kart become the biggest selling franchise for the Wii U 2. The Wii U stays at $250 because of the Game Pad 3. Any Redesign
Nvm, 16 million might be too low. If Melee sold ~7 million in 22 userbase, then SSB4 will sell 5 million in 16 million user base if we take the same attach ratio. Not sure if that's possible if Brawl sold near 11 million... And I really doubt SSB4 will have a higher attach ratio than Melee.