"Will New Super Mario Bros. U have some form of online multiplayer?
New Super Mario Bros. U will be releasing with the Wii U on November 18th, just over a month away now. Nintendo has not really detailed the Wii U's online features, and hasn't even really confirmed which Wii U launch games will feature any sort of online multiplayer, yet. We do know New Super Mario Bros. U and Nintendo Land, both Wii U launch titles, have Miiverse functionality; but Miiverse details have not been fully discussed by Nintendo either.
At the Wii U Preview on September 13th, Nintendo showed off two new game modes in New Super Mario Bros. U for the first time, those being the Boost Rush Mode and Challenge Mode. So, Nintendo had kept two new modes in New Super Mario Bros. U under wraps until the Wii U event, and nothing was said if either of those modes would have an online multiplayer function.
Why do I think New Super Mario Bros. U might have a form of online multiplayer, outside of just Miiverse communication? Brew yourself some coffee, and let's take a look!", writes CoffeeWithGames.