Hodir is a Frost DK playground because of the buff and Killing Machine. I was personally competing for World Top DK on that fight with another swapping #1 and #2 with him on a weekly basis. I also wouldn’t put much stock into Wandering Plague because we’re likely to get the nerfed version instead of the comically out of control version. I also highly doubt we’ll get out of control Bloodworms/Dancing Runeweapon.
With the changes Vanilla and TBC saw, I’m unsure of what to expect in Wrath. We didn’t get Vulnerability Damage this go-around, so Warlocks weren’t doing out of control damage in MC. Ability queueing ingame dramatically changed things, and seeing Affliction get beaten by Destruction in T4 instead of T6 was crazy.