The Consumer Electronics Show runs January 6 through 9th, and there should be something interesting announced by someone at the show. Last year Sony announced the HXR-NX5u and the HDR-AX2000 along with several consumer video cameras. It's also the time that Canon announced their updated consumer video cameras, as well as the EF 70-200mm f/2.8L IS II lens. Neither company usually announces much pro-video gear at the show; though the HXR-NX5u is in Sony's professional range, and the EF 70-200mm is a pro-lens....which means you never can tell!
The Canon Rumors site has a 5D Mark III rumor and they also separately report that Canon will announce some kind of camera - other than the point-and-shoots and consumer video cameras - at CES, though he's not sure what. He doesn't think it's the 5D Mark III, and I suspect he's right; unless Canon is feeling pressure from the Panasonic AG-AF100, it would be unusual - and early - for them to announce the 5D Mark III at CES.
The 5D Mark III spec list at Canon Rumors is doubtful too; RAW Video support? That seems unlikely. Maybe they'll improve the codec, or maybe even add 4:2:2 support, but RAW capture poses several problems for Canon and users including; is Compact Flash the right medium for recording uncompressed video? If you want to add some sort of "RAW" support, putting the full video out the HDMI port would seem the logical way to go.
CanonRumors: 5D Mark III [CR1]