Well the YJ generation are being replaced before our very eyes, much like they took up the Titans generation mantles in the 90’s. So DC comes up with a new generation of younger heroes every 25-30 years? (Titans 1960-1990), (Young Justice 1990-2020)...etc
Dick Grayson- Tim Drake- Damian Wayne
Kara Danvers- Conner Kent- Jon Kent
Donna Troy- Cassie Sandsmark- Yara Flor
Wally West- Bart Allen- Wallace West
Roy Harper- Mia Dearden- Emiko Queen
Garth- Lorena Marquez- Jackson Hyde
I guess Blue Beetle, Ms Martian, Solstice, Bunker...etc will be like Starfire, Raven, Beast Boy, Cyborg...etc and belong to all generations.