I would certainly be interested! I used the rear serial port to connect my 996XT's to the RH96 as a proof of concept, this also worked on the BCT15 and the BCT15X but of course would not work on the 996P2 (I tried...).
I suppose if you could fool the RH96 into thinking it was talking to an XT AND the P2 had the same data at the serial port as the XT does then it could work. Of course there might be other issues at play, such as whether the 996P2's internal firmware supports the same remote control commands from the rear serial port like the XT does.