Ulduar (instance) Idea Edit
When fighting your way in the Ulduar (instance), you'll finally enter the last room where you'll find *Random Titan-Boss Thing* and you'll start fight him for whatever-reason, but when he's at like.. 10% Brann Bronzebeard will enter the room, stopping you from killing him to "find out more information". He has a conversation with the titan, which tells him much about "everything", and then he'll end the sentence "And now, you know to much. Say bye'bye to Azeroth" and he'll knock out Brann and when close to kill him, "New" Muradin and his gang will run in and beat the shit out of the titan, and then you find some sort of artifact-chest thing and when you leave, you'll find Muradin thanking you and all that stuff you don't really care about, and Brann which now knows the truth will start a little event and.. stuff. Know its not gonna happend, but sounds cool to me!
Dalaran Crater Idea Edit
"Something cool will be left behind..." Wow, a crater, thats just awesome!! ... This ain't something COOL? Well, Blizzard only got one big content patch we know of so far, the Icecrown Citadel thing, and it will most likely be released very late, and people WILL be tired of all the WotLK stuff after a little while.. but... What if a übermage falls down and discovers a hole down in the Crater and everyone "Omg thats 1337! letz explore!!1" and then they go and dig there and find some magic cave -stuff dungeon-blablabla and its a new INSTANCE?! With meny ghosts and misformed things.