Not sure and I don’t exactly understand that part. It has to do with the themes and messages behind Bloodborne and how that game is a metaphor for awakening true humanity or something along those lines. But that was just a cross franchise hint for the actual parallel universe in Elden Ring.
From reading his posts, he doesn’t think the game is too hard he thinks there’s an entire game hidden inside Elden Ring. He claims there’s an entire parallel universe for the lands between hidden in the game files and no one has found it because they purposely hid this final “50% of the game” and made it impossible to find.