In principle this is bullshit, but the fact is we all know how these EA sports games go. Each year they come out with yet another reiteration but very little changes aside from roster updates and minor things here and there. That said, this isn't some huge loss. If you have the 2K11 or 2K10 or 2K09 version or whatever its all pretty much the same crap.
EA at least tried to add some Wii-specific mini games, plus the entire "All-Play" mechanism they implemente on all their games. But that was back when they cared. The Tiger Woods mini games were entertaining, disc golf was fun, etc. I actually prefer Madden on the Wii because of the point and pass controls. I just wished the games weren't so gimped on the simulation aspects.
The biggest culprit isn't EA. 2k had the nerve to release NBA 2k12 on the Wii with no online or updates, no rookies and roster updates from the end of the
previous season. It is essentially the final roster update from 2k11, repackaed and sold as a new game.