Can't say i really want to see any remakes. Simons Quest? Maybe even Dracula X. Give Richter the same ability as Simon in castlevania 4.
In all honesty they should just make a sequel to Super Castlevania IV, which would essentially be a remake of Simon's quest (Since SCIV canonically replaces CV1) but with SCIV controls, SCIV style graphics, and most importantly 8 way whipping and 'dangle' ability.
Where is CV going atm? If Konami are smart they will respark interest in the old canon, after SCIV has recently been released on Wii U VC, the time is now opportune. It's pretty much what Nintendo did with ALTTP>ALBW, make a direct sequel of a legendary game rather than remaking the legend which doesn't need it.... And yes, Simon's Quest sorely needs a remake.