What do you want to see in Cataclym dungeons?

I personally am really, really wanting to see a fight like the Green Dragon boss in Icecrown Citadel right now. For those of you who don't know how that fight works, it relies solely on healers healing a green dragon to 100% health from 50% while everyone else fights off adds. I don't think i'll experience this fight anytime soon, but I'm REALLY interested in it. A fight where healers take the important role? It's honestly something I've wanted for quite awhile. So as silly as it is, I hope they'll put another boss fight in a Cataclysm 5-man dungeon so that I can experience it, or something like it. I want healers to take more of a lead in the group for some fights!

What do you want to see in Cataclysm dungeons? Any bosses, events, or other things?

I agree with Myre on the ability to see all game content in a 5 player set up, that would be awesome as there are many areas I have yet to see in Vanilla, BC and Lich King due to numerical deficiencies.