The previews just been released on the US Battle.net site and it looks really interesting, and theres a mention of the abyssal maw meaning there's a chance the instance may still be part of patch 4.2.
us.battle.net/wow/en/blog/2658255
Edit: Plus this could also be a way of Thrall becoming the next Aspect of Earth since his spirit has been become part of the elements
Last edited by mmoc34d9a90a2e; 2011-04-29 at 04:13 PM.