Super Mario 3D Land has sold around 8.7 millions on the 3DS while it was doing bad. We haven't see that game in the top most sold games since a few while ago.
Super Mario 3D World is better rated, more beautiful and carefully designed for a powerful console like the Wii U.
New Super Mario Bros U has sold 2.1 millions alone, and it wasn't as well received as SM3DW.
To say right now that it will flop it is nonsense with no facts whatsoever.
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