From the recent interview he did. WHISPER is an organization made up of the AIM members who didn't want to go along with Sunspot, also.
http://marvel.com/news/comics/24879/...ngers_take_aim.
And in the background of all this madness—who else but W.H.I.S.P.E.R., and their sinister leader? He’s not new. You know him well, and you’ll see him sooner than you think. And then you’ll know you have to read this book. And I haven’t even mentioned the King of Space, American Kaiju, or the riotous return of Avengers 20XX! How much fun can one comic have? We're about to find out!