Does anyone know what they will be doing during the rehabs???

Are they just giving it a 'facelift' with new paint and fixing any broken or out-dated animatronics, or will they be completely changing some scenes? I had no idea this was going on, but I have been 'out of the loop' for a little while.
I love that ride, and I'm just hoping they won't do anything too drastic to it...mind you it was in need of some updating.