i kno the 3rd movie was weak, but this time we can change it up. it first start off Macdonald "Mac" Gargan as the scorpion gets defeated by spiderman. and soon after his defeat, King Pin caught up with Mac and promise him more power in return to defeat daredevil, so he gave him a Symbiote that he found left over from Eddie Brock's Symbiote.(and this time it can look like the real venom and not that clay looking thing) But Mac went back in his promise and went after spiderman. And the new venom made Carnage symbiote which he got his old jail mate Kasady to wear who was also defeated by spiderman.
and somehow the lizard and blackcat is suppose to fit in there.