It seems that real competition for the BMCC is really not all that far off at all.
This via FXguide:
Mini Kineraw announced (Via Matthew Allard (mattaljazeera) on Twitter) There will be Kineraw MINI very soon.
Features:
Only record CinemaDNG codec, No Cineform codec
Much smaller and lighter than KR. May be in your palm.
Same Sensor with KR, so it is S35 too. Same amzaing image quality then.
Fanless
Build-in Li+ Battery which may work 5 hours
Single SSD
Dual HDMI, but No build-in SDI
Same mounting system with KR, electronic Iris EF mount support
Audio is 2.5mm MIC in.
starting from 3999 USD release date TBA
Taken from:
http://media.fxguide.com/the_rc/the_rc-121-notes.pdf