Bolvar's planned involvement in Cataclysm

Back when Cataclysm was still in alpha/beta (or maybe just announced), I feel like I remember something about how Bolvar's scourge would be involved in Mount Hyjal in some capacity - as one of the forces opposed to Ragnaros.

I've never been able to find this later, except for [a gamefaqs thread](https://gamefaqs.gamespot.com/boards/534914-world-of-warcraft/56023920) who mentioned a leaked spell from the Cataclysm alpha:

> While I can't seem to find it, I recall there being a spell data mined early in the cata alpha that said something along the lines of "The Lich King's power weakens Ragnaros's Minions!".

Is there anything still extant online that shows what hints we had that Bolvar would be involved in Cataclysm?