I think I posted on here that I think the "Third" Edition will really be more a 2.5 Edition.
My ideas on changes:
Reprinted boxes saying "Third Edition" & Maybe instead of "Base Game" it'll say "Heirs of Blood"
Alternating turns (Lair of the Wyrm )
Morale Points System
Reinforcements for EVERY Encounter (Again Lair of the Wyrm )
& most importantly (as you may have guessed),
Fix Lair of the Wyrm!!!!!!! This campaign made me never want to play as the OL again!