Yeah, that and the timeless eye quest item makes me think CoT:WotA will come out with Firelands, seeing how its the only raid we've even heard of. The biggest reason we got that post talking about the troll dungeons is because rift came out; there's probably still a long way to go until the patch, and I wouldn't doubt if they threw in Abyssal Maw with the troll heroics to make tier of 3 harder heroics (think icc).
Plus, 4 bosses makes sense for CoT; I can't imagine how they'd be able to retcon any more in.