Sony is not selling a full-frame camera. They do supply Nikon's sensors, making business planning a headache for both companies regarding full-frame.
Nikon will continue to say that there is no need for full-frame and it is a waste, right up to the point when they announce a FF camera, at which time the party line will become that now it is perfected and it is the wave of the future.
Canon's product cycle has been 18 months, but the 1DsII is already 28 months old. Product cycles are lengthening, now that the DSLR market is maturing and approaching saturation (got a year or two to saturation yet). A 5D replacement is not guaranteed and if one appears, it may be a tweak like the 20D to 30D tweak. Don't expect a cheaper new model either, though one wouldn't surprise me.
This sounds like the patent clerk that decided to close the patent offie because he believed that all that can be invented have been invented and no new patent is necessary.