For Disney Movie Rewards Members the DMR points needed to redeem for the Mystery Blu-ray has been reduced to 750.
Some report receiving Up 3D in the last few weeks. YMMV of course, and it will most likely not contain a digital copy, but 750 points is pretty low for a Blu-ray.
http://www.disneymovie
FYI Mystery DVD is 350 DMR points and Disney Junior Mystery DVD is 450 points.