https://www.vg247.com/2018/09/19/castlevania-requiem-symphony-of-the-night-rondo-of-blood-ps4-rated/

The Korean Game Rating and Administration Committee (GRAC) has today awarded Castlevania Requiem a 15 rating in the country.

The game page mentions that both Symphony of the Night, and Rondo of Blood are included. Only the PS4 version was rated, but the rating board looked at two releases, one in Japanese, and another in English, which could indicate a Western release.

BTW I want DS castlevania collection.

All 2D Castlevania games in a compilation. BRING IT, KONAMI!!!

Could this be for PS4 as well as PlayStation Classic?

Rondo Of Blood wasn't on the PS1 I believe.

Oh, you're right. Thanks.

Could it be that it will be released on Xbox and Switch as well? Perhaps a Castlevania collection is coming. Either way, happy with with whatever.

Yeah, I'd be surprised if these aren't coming to Xbox and Switch as well.

More and more 3rd parties have come to their senses about reaching as many people as possible.

It is a good thing. If not for newer games, definitely for older games. They have no reason to be left out from anything anymore. 

Agreed.