According to the New York Post's Lenn Robbins, George Mason and Virginia Commonwealth will join the Atlantic 10 on May 1. Robbins mentioned Butler was "probably" joining as well.
The Atlantic 10, which loses Temple to the Big East in 2013, further widens its eastern footprint with the additions of Mason and VCU. Butler would add a Midwestern component to go along with Saint Louis, Dayton, and Xavier.
It has been rumored several times that the aforementioned schools could potentially join arguably the nation's best non-Big Six basketball league.
George Mason and VCU have each made a Final Four appearance, and back-to-back national title appearances by Butler are certainly a strong indication of a quality program.
Stay tuned as this story develops