/agree

If he could come back in MgT, why not at level 80? :D

Hell. Yes!
Always time for another round of MgT!
Still one of the best instances, imho

he could be the guy that keeps on coming back! Just when we thought he was gone for good, He's back for a level 100 raid boss!

Exactly what I was thinking. Magister's Terrace was just a setback.

I think if Kael'thas showed back up as one of the San'layn like Valanar or Keleseth that would just be very cool and would fit in very well in this expansion.

Personally though, I'd love to be able to go back and do Illidan again. That is still one of my favorite raid fights in the game.

As far as whether this sort of thing is feasible in the lore of the game or not think about this: Paletress. Part of her fight is that she summons shadows from your past in the form of old raid bosses. Think about expanding on this. What about 10 and 25 man versions of the bosses, with all of their original abilities. Maybe they could just drop badges or epic gems instead of having to completely update their loot tables. I'd love to be able to have her summon up a Shade of Illidan to fight again.

Or maybe a Shade of Shade of Aran. :P

His head's gone, right? We actually removed that from his body, right?

Hallow's End, we got a bad guy without a head, right? Supposed to be a fallen paladin? Couldn't he easily have a comrade, a fallen mage driven mad while trying to save his people?

Kael'thas and the Headless Horseman, Hallow's End bosses '10!