This is the most sensible rumour about a 5D2 replacement that will also replace the 7D.
Improved weather sealing, fine. 1D4 AF - also fine - just so long as it's better than what is currently in use on the 5D2.
Those features couple with 22mp would certainly lead to a spec sheet they could pull in at the £2200 price range or less. It really would be nice if they could add that dual card slot as well.
As for reduction in price? Why would they? £2200 on release will soon drop to under £2k on the streets once demand has been met. A baby 1DX for under half the price of the 1DX will please a lot of 7D users and 5D2 users wanting to upgrade.
I can almost here the kerching of the cash registers as this camera flies out the door
