Actually, I wouldn't mind a HD 2, with creativity in mind.
All or most of the stages can be New
Slightly Redrawn Characters a la Maria PSP with extra Costumes and a Palette editor (like GG Isuka)
Each character should play Mostly like thier respected game, a Dual Wielding Soma with Stolen weapons was BS
Have a Stage Making Mode with tons of extra enemies and Bosses not in the main game (to promote the usage of it)
A Score as EXP Level system and Weapon Upgrade system.
A random Form Dracula Battle (he has enough forms to randomize)
Allow player to carry 4 different items (RT+A,B,X, or Y) at respected amount plus auto item refill.
A serparate Dual Crash Bar, and a Dual Crash per person, no recycles
other fixes and Special Features