B&H has just posted their ad for the new Canon 50.6 megapixel full frame CMOS camera here: Canon EOS 5DS R DSLR Camera (Body Only) 0582C002 B&H Photo Video
50.6MP Full-Frame CMOS Sensor
Dual DIGIC 6 Image Processors
Low-Pass Filter Effect Cancellation
3.2" 1,040K-Dot ClearView II LCD Monitor
Full HD 1080p Video Recording at 30 fps
61-Point High Density Reticular AF
150,000-pixel RGB+IR Metering Sensor
Native ISO 6400; 5.0 fps Burst Shooting
User-Selectable Shutter Release Time Lag
Dual Compact Flash and SD Media Slots
From the ad:
"The EOS Scene Detection System with the 150,000-pixel RGB+IR metering sensor provides precise exposure and color metering and the 61-point High Density Reticular AF sensor with 41 cross-type points enables accurate AF placement and Canon's EOS iTR (Intelligent Tracking and Resolution) enhances AF performance by using information from the metering sensor. Crop shooting at 1.3x and 1.6x allows for flexibility in the size of image files (30MP and 20MP, respectvely) and the selection of lenses. M-RAW and S-RAW settings are supported for shooting images at 28MP and 12.4MP and a built-in intervalometer and bulb timer expand your creative options."
$3,899.00 for the 5DS R model with low pass filter cancellation
$3,699 for the 5DS with no low pass filter cancellation
Expected availability in June of 2015. Still 4 months out...