Lots of rumors going around that the CAA is in fact looking to replace James Madison and it seems as if Monmouth is going to be the addition. In fact, Daniel Steenkamer of Hero Sports flat out reported that the move to the CAA is imminent.
This kind of move (JMU leaving, CAA adds MU) has been a rumor for a while, but mostly just with the realignment nerds on internet forums and on social media. I think there was some expectation that they'd just stay put at 11 and reap the benefits of having one less member in an already large conference. We'll see what happens in the next few days.