Konami is not expected to produce new Castlevanias soon and the last release of the Belmont’s saga was Castlevania Anniversary Collection in 2019. Another collection could be in development.
Castlevania Advance Collection has been rated in Australia. There is not more info about the title aside from the M rating.
The Advance Collection should include Castlevania: Circle of the Moon (2001), Castlevania: Harmony of Dissonance (2002) and Castlevania: Aria of Sorrow (2003).
Come on, Konami, do something.