Smith & Wesson uploaded a video that says there is something new coming 4/12/2012. Considering there is M&P logo at the end, it is speculated that it is a new M&P model. Perhaps a new model or 2nd generation M&P(this is way off base speculation).
Earlier this year at SHOT show, S&W discontinued SD9 and SD40. I was not able to get the reason for such decision, but maybe this is one of the reasons.
Guns, Holsters and Gear found out that Smith & Wesson's Form 8-K quarterly filing showed that there is new model for the M&P platform, in concealed carry and personal protection as well as consumer and professional.