I hope the Nintendo Wii continues with the one player option.
I like many other gamers love Online Gaming.
It's just a storyline helps to give multiplayer a more defined addition to the gameplay.
Like the covenant in Halo 2. I think the Wii will hold on to single and multiplayer gaming styles as well as Online Multiplayer.
The Wii has already made many innovations to suit many different gamers.
It would surprise me if Nintendo chose to eliminate single player like it's competetors have for some games.