User blog comment:ADour/Welcome to the MCU, SPIDER-MAN!/@comment-4651179-20150212202158/@comment-1895174-20150213003347

It doesn't need to have any connection to John Jameson. It could be something Peter Parker brings back with him from when he was with the Avengers fighting Thanos. We're talking about the MCU here; "space mumbo jumbo" is all over the place at this point.

We can mix Eddie and the symbiote's origins. Eddie as a childhood friend that grows to hate Peter because he feels he betrayed him, and then the symbiote, which also feels betrayed by Peter Parker, throws those emotions out of control. That doesn't require the symbiote itself to be a creation of Eddie Brock Sr. to work.

As for giving Peter's parents a way into the story, Marc Webb's movies didn't have the benefit of having SHIELD around. And, like how Ant-Man explores the history of the MCU in the 60s, a Richard & Mary Parker miniseries allows the opportunity to explore the history of the MCU in the 80s & 90s. And the spy action works great with the serialized format.