I just stumbled across some intersting numbers on the platform totals page, check out the following total software sales for Nintendo consoles excluding the Wii:
Europe:
SNES - 47.25M
NES - 42.21M
N64 - 41.04M
GCN - 40M
NA:
NES - 228.08M (90% market share)
N64 - 139.37M
GCN - 135.02M
SNES - 132.98M (even with the Genesis/MD's 95.42M together they only total 228.4M, not much growth GoG)
I excluded Japan as not only is there no pattern but even the Wii didn't match the NES/SNES there.
For reference the Wii moved 481.72M in NA and 248.15M (more than their previous 4 combined - wow) in Europe.
Now with this info is it possible for the Wii U to get close to these levels of software sales? If so do you think it could be judged as a success?