NeoGAF said:
I made a post at MMO-champ a few months back, but it seems to have disappeared. The attunement and had the raid taking out spotters, lieutenants and such in Grim Batol to make way for a massive Dragon Army to invade and kick Deathwing's ass.
The first phase of the fight was just pure survival; you're on the ground in a huge forge (similar to the central area of Ironforge) and there's tons of dragons flying around trying to kill Deathwing, including Alexstrasza who's leading the charge. All you have to do is avoid getting smashed (by Deathwing himself or the rocks as the fight tears his chamber apart) and run to protect dragons that fall (Healers heal them back up, tanks and DPS focus on adds that swarm in and try to finish the friendly dragons off).
At the end of Phase 1, you have no choice but to retreat, so everyone mounts up and flies out. Deathwing tears through the ceiling and chases you, firing huge lava bursts (which would be easily dodged) and generally trying to kill Alexstrasza.
During Phase 2, players can either be on Deathwing himself (using a Grip ability similar to the Storm Peaks Daily) or riding on other Dragons.
Those riding on him have to attack his armor plates while dodging plumes of magma that come gushing out. Some of the raid stays on dragons and can use their breath attacks to push the plumes out of the way (which is required once you have a bunch of plates off) and use their abilities as normal (so healers and ranged DPS would hop on dragons). If a player fails to hold on, a dragon comes to pick them up, but the dragons themselves cannot dismantle the armor, so too many people can't fall, but there's some wiggle room.
Once the armor is exposed, Alexstrasza comes tearing ass at him and rips the shit out of Deathwing, and they both end up plummeting down into Northrend, of all places. Deathwing hits the ground, weakened, and Alexstrasza tips over a cliff and more or less dies.
Phase 3 involves the players actually tangling with Deathwing personally while Alexstrasza's consort flies off 'on a desperate mission'. You don't kill him so much as you keep him too weak to fly off. Once you had the big bastard down a bit, the consort would return, half dead, with a chunk of the Frozen Throne, the only substance cold enough to actually stop Deathwing. The last half of the fight is basically Deathwing going berserk as the raid tries to keep him down until the shard of the throne can be jammed into him (the consort assists during the fight and when Deathwing his a certain amount of health, finishes him off.
After that, Deathwing turns to stone, Alexstrasza crawls up to mutter a few goodbyes to the raid and her dragon buddies before she dies, and the raid gets phat loot.
Probably a bit too long though, 3 phases. And the tie into Icecrown is probably just silly, but... meh, it'd be cool to fight Deathwing in mid-air. :lol