Cream147 on 14 April 2015
Though the poll clearly shows disagreement, I think the correct answer was Super Mario 3D World. My rationale is this.
Galaxy vs New Super Mario Bros Wii = 11 mill vs 28 mill
3D Land vs New Super Mario Bros 2 = 10 mill vs 8.6 mill
Conclusion: 3D Land series picks up sales easier than Galaxy series (when looked at with respect to their individual consoles). Therefore 3D World would have sold better than Galaxy 3.
There are about a million logical pitfalls here but suffice it to say I think 3D World did about as a 3D Mario could hope with the Wii U install base. 3D Mario simply isn't as lucrative a series as the ones that have overtaken it in sales - it could never hope to compete with 2D Mario or Mario Kart anymore.
