When I read today's news, regarding the new Glory of the Icecrown Raider mounts, I noticed that defeating the Lich King on Heroic is not a prerequisite for your mount. This kind of intrigued me, as I'm a member of a raiding guild that has their drakes in Ulduar and Naxxramas.
Glory of the Icecrown Raider (25)
The only two achievements regarding him are:
Been Waiting A Long Time For This
Neck Deep In Vile
So, what do you think? Will Arthas really be that hard?