There are some funny rumors out there right now. My favorite is that we are replacing Sandstorm with a Dubstep version of Darius Rucker's version of Wagon Wheel
I think most likely it's one of 2 things, or maybe both.
There is a planned renovation of Williams Brice Stadium (basically adding more vegetation.)
Also, the baseball coverage radio contract is rumored to be coming up soon, so it might have something to do with that. If 107.5 is the one calling this a major announcement, it might mean that they got the rights for the next few years.