Kirby skews towards a younger, female audience while Donkey Kong is better suited to the older, lapsed gamer.
New Super Mario Bros is from last year so I don't think it counts. If it's bundled in both America and Europe, it won't even matter.
Super Mario Collection is mostly for Japan, who have proven themselves completely bonkers over 2d Mario.
Aside from this, the only other 2d platformers are downloadable titles. It is certainly not as saturated as the first-person shooter market and deserves the extra attention its getting.







