So, this will not open to many people w/o reading Night of the Dragon - in short it is a incident in Grim Batol pre-wotlkish time. It includes Krasus (Korialstraz) A draenei priestess called Iridi, Kalegcos, Vereesa Windrunner, a group of Bronzebeard dwarven and a nether drake Zzeraku. (almost forgot Rhonin)
The villains here are Sindragosa, A mage-eater - Rask, Dargonax (1st really strong Twiligh dragon) , Twiligh drake twins, Zendarin Windrunner and recreated Demon Soul (as such a powerful artifact it should work as an encounter.
Now, discuss about the ideas of implementing it as a raid.
My suggestions : Start off with Krasus/kalec vs. the twilight drake twins outside GB 2. Fight Dargonax until he allies with Kalec, Then fight the almostdead Zendarin after Dargonaxes "feeding" on him, Demon soul /sinestra MC`d Kalec , then Sinestra. Thrash - skardyn and drakonids. (Left Rask out on purpose)
Well, IMO this is a good idea - like I said earlier . Discuss and tell about your ideas for the encounters and etc.