Direct answer
No authoritative complete boss roster is currently available. Trailer appearances cannot reliably establish unique encounters, names or optional variants.
What is not confirmed
This answer is intentionally limited to what the cited primary source establishes. It does not rely on fan-maintained lists, retailer placeholders, edited trailer cuts, leaks, or assumptions imported from other action RPGs.
How this answer will be updated
The page will be checked after the dedicated summer State of Play, material store-page changes, and the retail launch. New details will be added only when they answer this exact question; separate search intents will keep their own URLs to avoid overlap.
Primary source
PlayStation hands-on, last checked July 31, 2026. The linked bosses hub provides the surrounding guide context.