At E3 2010 has been released a video of Castlevania: Harmony of Despair, the next chapter of the series out on Marketplace is part of the initiative and Summer of Arcade. As we can see the movie, the game will feature a cooperative mode where players can play as some of the most important series, as Alucard Castlevania Symphony of the Night or Soma Cruz Castlevania: Dawn of Sorrow. I'll suggest below.

Castlevania: Harmony of Despair (Live Arcade) - E3 2010: Debut Gameplay | HD version