They’ve marketed it as miles AND Peter fighting Venom tho. I think Miles uses his powers to get the symbiote off Peter (pretty much another take on the bell tower), but I don’t think Peter BECOMES venom tbh. Once Peter loses the symbiote, i don’t think the symbiote will exclusively need a strong host. It will bond to any regular Joe.
Peter and Miles are clearly gonna fight venom together, so someone becomes venom. I think it’s Harry at this point. Venom learned that “heal the world” phrase after bonding with Peter