I didn't like DoS story wise. There is a threat. The bad guys are killed. And, all is right with the world. That being said, Dracula doesn't always need to be the big bad. We don't always need the Belmonts either (I'm going to regret saying that aren't I?). Let Alucard and the Belnades family take center stage for a while. Soma should just be left alone to live his life.
That timeline needs a new evil to take over. Hell, it could be turned into a 3 sided conflict: good, the new evil, and a faction of monsters still loyal to Dracula led by Death. It would added a new dimension that could make the storyline pretty interesting.