4.2 hits Live Servers in 2 Weeks with Firelands, but what nobody knows is, that the Cavern of time Raid "War of the Ancients" +5man will hit live soon!
First Blizzard want to test the 4.2.2 Patch on Ptr, but it seems to be a Retail test (Cause cancelt subs. and not enough bosses)
Cot - Wota would be a 6 boss Raid
This is "unofficell" information but my source is still legit and it would be this way.