Very likely that this won’t happen but my minds running so I may aswell get it off me chest.

Now we know that more than likely that carnage will be the dlc for Spider-Man 2 (assuming that we get dlc that is). Now depending on how they handle carnage (whether they kill him off, or survives the encounter) it is possible that carnage could birth Toxin before carnage is defeated. Then at some point in the third game, you team up with toxin. Would be so cool.

Also possible that toxin could be his own symbiote like carnage is. Of course that may imply other symbiotes like riot and what not could exist aswell.

Would be a cool concept if it were to be true though.