The lower the userbase, the higher the probability for a higher attach rate.
Let's compare sales of the games at the same time, shall we?
Wii Sports (bundled) 9.3M - Wii Sports Club 0.02M (-9.28M)
Mario Kart Wii 5.81M - Mario Kart 8 2.4M (-3.41M)
New Super Mario Bros Wii 22.03M - New Super Mario Bros U 4.16M (-17.87M)
Wii Fit 5.58M - Wii Fit U 0.38M (-5.2M)
Super Mario Galaxy ~5M - Super Mario 3DWorld 2.21M (-2.79M)
Wii Party ~5M - Wii Party U 1.33M (-3.67)
Legend of Zelda: Twilight Princess ~3.5M - Legend of Zelda Wind Waker HD 1.03M (-2.47M)
DKC Returns ~4.5M - DKC Tropical Freeze 0.64M (-3.86M)
Proud to be the first cool Nintendo fan ever
Number ONE Zelda fan in the Universe
Prediction: No Zelda HD for Wii U, quietly moved to the succesor
Predictions for Nintendo NX and Mobile
