Ok so im having a bit of a debate with a friend, we are trying to come up with what we both think are the top 3 greatest threats there have been since WoW's inception. The only one I would definantly have in my top 3 is Deathwing. Sure, Archimonde and KJ were both very powerful in their own rights.. Guldan, Algalon would have sent the "delete Azeroth" signal had we not defeated him. The Old Gods though powerful.. we have only fought very weakened versions. I don't think the Lich King would get anywhere near the top 3.
So help me out.. what do you guys think?