The god who made the symbiotes, held somewhere he cannot leave, and looking for the one key that would let him out.
Knull is the creator of the symbiotes, and he wants the codex that Eddie and Venom carry because it would free him. Andy Serkis plays him, having directed Venom: Let There Be Carnage first. Kelly Marcel has said they knew during that film that Serkis would be this character.
He is the largest thing the Sony films ever pointed at, and the trilogy ends before it has to deal with him. This catalogue records that as an open thread rather than a resolved one.
Show detailsWhat is not named on screen
The same film is careful about names in general. It never names the green symbiote that bonds with Patrick Mulligan; the official subtitles for the trailer call it Toxin, and the symbiote that saved Mulligan’s life is left unidentified. Where a film declines to name something, this catalogue does not name it for it.