Nintendo’s product manager, Bill Trinen, has confirmed with Kotaku that Nintendoland will not feature online multiplayer. There will be local mutiplayer and there may be some sort of online functionality, but this has not been confirmed.
It’s not going to be played over the network. There’s actually a logical reason for why they decided to do that. I think for… Up until now, basically, when people have said, “What does a network mean for video gaming?”, the answer has always been “online play.” We look at online play and we think that it’s important, and obviously for games where it makes sense, we’re going to leverage it. But for Wii U launch specifically, one of the things that we want people to understand is that a network connection to a game can mean a lot of different things. It can mean online gaming, but it can also mean other unique ways to connect to other people.
-Bill Trinen, Nintendo product manager