lost my P2V+ to a fly away a few months ago. Was able to get some credit from DJI but it expires Jan 22. Going to buy a P3 standard. I see now that they are offering a free backpack (which I don't really need as I have a pelican type case). I was hoping that they had the extra battery offer. Also heard rumors of P4 (P3 came out about 2 months after I bought my P2). Anyway to tell if the extra battery offer will be coming out in early January or hen P4 will be out (and possible price drop on P3)?