Good news, everyone! I've fixed the poison slime pi -- wait. We've got other good news! Heroic Shadowfang Keep and heroic Deadmines, which were said at the Cataclysm press event
to have been scrapped until a later patch, are now slated to be in at release! Valnoth has confirmed that the new versions of these classic dungeons are being released with Cataclysm
Valnoth -- Re: Now when Valnoth said ALL dungeons...
Heroic SFK/Deadmines are not being released with Cataclysm, but with a patch after it goes live.
Heroic Shadowfang Keep and Heroic Deadmines WILL be released with Cataclysm. You will not have to wait for a later patch.
Players can now expect Deadmines and Shadowfang Keep to join the heroic ranks of Throne of the Tides, Blackrock Caverns, The Stonecore, The Halls of Origination, Grim Batol, Vortex Pinnacle and The Lost City of Tol'vir when Cataclysm