The following comment comes from Super Mario director Yoshiaki Koizumi...
"I can't reveal the actual number of power-ups in the game right now, but suffice to say that we do try to include enough so that people can enjoy a variety of different kinds of play experiences in the title. Also, I should point out that we don't necessarily decide on what number of famous Mario suits will appear in the game and proceed from there - we try to find interesting gameplay ideas and then try to settle on what to do in different places. I can say that we will definitely have some more familiar suits than just the Tanooki Suit."