You must have noticed by now that a lot of cinephotographers are using old Nikon or Zeiss lenses with their 5DMrkII. These lenses allow their owner to set the aperture directly on the lens, removing one of the variable of the automatic exposure control in video mode.
I must admit that I was about to get one of these. They are just so more convenient than the series of tasks required to get the desired aperture/ISO/shutter speed.
Well, if you can wait a few more days (or week), the next firmware update from Canon might make these lenses obsolete!
Ok, this is all rumors and speculations from www.5dfix.com but it seems plausible in the current context. Lets not forget that competitors are coming in with video d-SLR or bridge cameras too and they have been listening to all cinephotographers complains! They offer full control over the exposure triangle, 24p and even 60fps!
Nothing like competition to push innovation! And nothing like a rumors to give us hope!