Think about it. Most movie series that were popular back then as well as the occasional video game are getting box sets to have them all right there.
Now, Castlevania has a LOT of games. Some games people don't even have access to most of them. Wouldn't it just be extremely convenient to buy a sort of "box collection"?
Like, all the games right there so that you can pop them in and play, maybe done in 4 or 5 discs, with Disc 1 being all the 8-Bit Castlevanias plus Vampire Killer and Haunted Castle and the handheld 8-Bit games, Disc 2 being the SNES games, Bloodlines, the GBA and DS games, Disc 3 being the two N64 Castlevanias and Castlevania Chronicles and Dracula X Chronicles, and Disc 4 being the two PS2 Castlevanias (If it's possible to fit them into one disc, otherwise have them each on two discs).
Think about it, this would possibly be the most convenient collection ever for Castlevania gaming. It would probably do well to sell such a box set for the Playstation 3 or PC since the PS3 has Blu-Ray and can possibly fit the larger games into one one disc and everything else into one disc, or PC since computers pretty much outlast everything and you never need to worry about buying new consoles or anything.
An entire set like this would most likely be a smarter idea than just re-releasing one, two, or three games at a time in the Chronicles series.
I would definitely buy this. The only downside is that this would probably be expensive as hell.