In some insane piece of Nintendo-logic, they have answered the cries for the 3DS version of the game to implement online multiplayer (like the WiiU version will already come with.) However, to get online with your 3DS you need to connect to a WiiU, which, additionally, has to be connected
I don't know what's possessed Nintendo with this one but this just seems mad. If you had a WiiU, wouldn't you just play that version online? Especially if you have to buy a special Nintendo adapter to get the WiiU online via ethernet instead of WiFi? Oh Nintendo, you so crazy.
Also, feel free to discuss demo thoughts here - I'm jumping into it now!