I would expect the camera to work just fine with PPro 1.5, though you may need a plug-in for the DVCPRO formats (Main Concept makes one. I’m sure there are others).
Rumors on the camera abound both here and elsewhere. It’s probably easiest at this point to relax and wait for the press release from NAB. It’s going to be months before the camera reaches the real world, and then I’d want to wait for my local Panasonic dealer to get one I can have some hands-on time with before I made any decisions.