We’ve been wanting a Castlevania collection for ages, so that would be extremely cool. Though I wonder what it would include? There’s no way it would be complete. I’d say they’d ignore Judgment and also most of the GBA and DS games (which would be especially sad since they are such a big part of the legacy by now). EDIT: Although if it’s a Switch exclusive, perhaps Konami think that the handheld games would make sense.
I think it would be this bare bones:
Castlevania
Simon’s Quest
Dracula’s Curse
Super Castlevania 4
Rondo of Blood
Symphony of the Night
Not holding my breath for these, but I guess they could be there:
Bloodlines
Castlevania 64
Legacy of Darkness
ReBirth (if these rumours are true, I guess?)
Chronicles
Unlikely:
Lament of Innocence
Curse of Darkness
Lords of Shadow 1-2
All the rest I’d say is highly unlikey (Mirror of Fate, Judgment, Despair etc etc....)