Earth-92131 Mordo in the Marvel comics attempted to free Dormammu using a probe that contained Venom symbiote which Eddie Brock ended up with. Although the Venom trilogy isn't part of the MCU ...

It doesn't matter what portal or alternate reality Sony digs into to revive Venom from; just make sure that Alan Ritchson is ...

At the end of Absolute Carnage, Eddie is given a choice between killing his son Dylan and stopping Carnage once and for all, or keeping Dylan alive and waking up Knull, the Symbiote god.