A higher end C300?
There is some thought that we may be seeing a new Cinema EOS video camera announced or shown at NAB instead of the 4K DSLR.
It's rumoured to be priced in the $30K+ range. No specs were given, but this info also appeared on a twitter feed with a price mentioned over $35K.
I will say, information about a 4K DSLR has been hard to come by so far.