Companies don't really launch random new sites like 20 years ago. They focus on building out big studio brands like Brazzers, Blacked, Vixen, Adult Time etc.
Launching niche or shock sites like gorillagras with 4-6 scenes every few months is a long past era.
Your best resource to what it's being released since there is no one authoritative business resource site anymore is probably the review sites.
https://www.thebestporn.com/listings_new.html