From the official WoW Spanish forums
today comes three important new facts about Cataclysm
- You will need to discover the dungeon first before it will appear in the Dungeon Finder
- It is possible heroic dungeons will require attunements
- The internal gear checking will be stricter for Cataclysm heroics than it is for current Wrath heroics
The translated blue announcement is as follows:
Looking to Cataclysm, maybe you want to know that, for normal dungeons, players must discover the dungeon in the world prior to access it from LFD tool. It is possible that you could see attunements for heroics and raids (which would be similar to the one of Karazhan). Developers arent sure yet of whether they use attunements or not. However, heroic dungeons at level 85 would probably have more gear requirement (in comparison) than heroic dungeons at level 80.
Many thanks to Antonio of Guias WoW
for helping us out on this!
World of Warcraft: Cataclysm will destroy Azeroth as we know it. Nothing will be the same. In WoW.com's Guide to Cataclysm you can find out everything you need to know about WoW's third expansion. From Goblins and Worgens to Mastery and Guild changes, it's all there for your cataclysmic enjoyment.