Shiggy gives a different reason for no online in NSMBWii

[r3av3r2k1]

This is quite simple,nintendo new from the get go that this would be a massive hit with just local multiplayer, and in a couple years from now they can release a NSMB2 with just new levels and online multiplayer and all the nintendo fanboy will be extremely happy that the only thing that was missing from the original title is now on the sequel

Dont kid yourselves nintendo fans, nintendo will sell the same game twice, one with local multiplayer and a sequel with online and with very little effort they will sell some 50 million copies and everyone will be happy in the end of the day