Honestly, if we are talking remakes then we need to take a lot into account here. Music, graphics, story etc. I already seen that some don't like this idea, but I would adore seeing HoD remade. Maybe it's just me, but I really have a soft spot for Juste and would like to see further character development on his part as well as the in and outs of the nature of his friendship with Maxim as well as his connections with Lydie. The sound track for the game was not bad, though I would like to hear an updated versions, perhaps full orchestra as well? I'm a sucker for the 2-D side scrolling and they should keep it that way. Update a few things here and there, but keep it classic? (t really irked me the 2-D,3-D meshing of PoR :/)
I suppose another would be Dracula's Curse. Updated music, graphics is really all that is needed. We already know that characters pretty dang well, so I doubt further development is needed on that part.
I would also like to see Bloodlines get a nice boost! Though I like the music just the way it is to be honest. However a good ol' graphic boost would sure be nice!
Besides those, I mean really any of them has potential to it. I would however crash and burn if they redid SotN!