Story and Characters & Stages.
Mini-games would be my 3rd option.
The mini-games allready look awesome and that's why I want to see more about the 2 above.
Sorry for not updating this in a few days guys didn't really get a chance to go on the computer in general. :-\
Faster Tempo
10 (20.4%)
Elements from NSMBWii and Galaxy used
13 (26.5%)
Dice Block items (such as the 0-1 and 4-6 blocks)
4 (8.2%)
Perspective Mode
3 (6.1%)
Boss Battles (3 per board)
14 (28.6%)
Mini Stars being only currency/No Coins
5 (10.2%)