SOMEONE HAS TO KNOW!

[offensive]

It's a single stack 9mm smaller than the M&P compact

http://www.thetruthaboutguns.com/2012/04/ryan-finn/new-mp-9-shield-photo-leaked/

 

[S&W Rover]

It looks like the right ingredients are present. We'll see -- still a lot of questions as of today (the 10th) such as what calibers and how wide and will Apex parts fit... but, I think they are on the right track!