This mythical new camera has been continuously rumored for YEARS! Why would anyone put any faith in this? If the Canon rumors site is correct it's the just like a blind pig finding an acorn. Sooner or later they're bound to be correct by sheer chance. IMO, if you need what another camera maker offers you'd be far better off getting it from them than wasting years waiting for Canon to develop something comparable.
"This will be the death of medium format" - FredBGG