Completely disappeared without a trace. And deserters, who should have been brought back from previous installments of Heroes.

I completely agree. Let's bring back the azure dragons! But if there were dragons with different levels – magical at level 8, crystal at level 9, rusty at level 10, and azure at level 11. The first three would occupy four squares (large creature ability), and the azure dragon would occupy 8 or 12 squares and simultaneously have the huge creature ability – the idea is that all 7 units from the army could kill it at the same time!