Sekiro doesn't need a sequel imo. Miyazaki and whoever owns the Berserk IP should finally bite the bullet and finally make that Berserk game in the action style of Sekiro. They could and should go absolutely crazy with the animations and crazy anime bs, since Guts doesn't fight anything like a slow ungabunga build in the Souls games.
I'd cream my pants if they ever do it. Let's go already!!!!