The correct way to follow up Harmony of Dissonance would be to call it *something* of Dissonance, I think. Just like the Sorrow games are connected by Sorrow, not the Aria part.
EDIT: Nah, I changed my mind. But "Despair" shouldn't be there. If it really is a sequel to HoD they should call it...dunno.. Harmony of Turmoil? Harmony of Chaos? Dunno.