Maybe they'll have two symbiotes come to Earth, one ends up being Venom, the other - some random bad guy. The movie deals with the inner turmoils of Brock's mind, turning him eventually bad but showing a little humanity by saving some school kids/some other shit/the world from this other symbiote guy. The aftermath wipes out the baddie, but a little piece of him remains fused with Venom, which jumps out of him due to being too evil or something. This little piece then falls into the hands of a certain Cletus Kassidy... Sequel demanded.