The DS games and the Wii game kinda makes a complete Castlevania collection impossible. Well, not impossible, but very unlikely. It would basically have to be on the Wii. Unless they change the controls in Judgment. Also, the DS games could be done on other consoles, but Dawn of Sorrow uses the stylus quite a lot... Anyway, what I'm saying is; I want a COMPLETE Castlevania Collection, otherwise I don't see the point. I hate when developers make a collection and leave games out because they're "hard to port". Or even worse; because they weren't "good enough". We'll be the judge of that!
2010 is a perfect year for a Castlevania Collection, especially since Lords of Shadow is coming. It would be a way to say farewell to the old series, or something, and then move on.