Curate, connect, and discover
Jack and Maddie Fenton, after college and prior to having their first child, were highly-effective super villains. Mad scientists the likes of which Luthor could only dream of achieving.
They were so fucking frightening that this is what drove Vlad away. He wasn't biding his time, he was goddamn hiding from his ex-best friends so that they wouldn't dissect him.
Shit man, they'd nearly done it to him when he'd been fully human. If they found out he'd become part of their obsession?
So yeah Vlad went to ground.
No financial backing, no morals, only science. Everything was a science experiment, full stop.
Then they had a daughter, and like...huh. This. This wasn't an experiment. This was perfection? A mix of both Jack and Maddie, in one tiny perfect body. She was adorable.
And the government, knowing that if these crackpots were dangerous before, holy fuck they'd be unstoppable now cuz protective parent mode go, offers them a deal.
Stop attacking people, stop experimenting on people, stop being villains, make weapons for the government. Do this, and the government will set them up in a house, let them continue experiments that do not infringe on human rights, and the kid gets a full ride scholarship to whatever college she wants, however many times she wants to go.
The Fentons took it; shit man a free scholarship is nothing to laugh at, they'd been to college. That debt was the driving force to them turning to villainy in the first place.
By the time they had Danny they'd fully acclimatized to being strange, ghost-obsessed parents.
The accident happens, Jack and Maddie don't know, shit goes down, and the GIW find out before they do. Then Danny goes missing, after his last known location was being shot down by the GIW.
Now Jack and Maddie, their kids are perfect. Small, cute perfect little kids. Theirs and theirs alone. If one of them managed to become half of the thing they were obsessing over, then they would learn to live with that, because he was their son.
The GIW had hurt their son.
So they made sure Jazzy-pants was secure, protected, and safe; and then proceeded to get all of their old super-villain gear back, decimate the GIW, and commit multiple war crimes.
The government, thinking that they've gone back for no reason, freaks and calls the Justice League. The Justice League who had never had to fight the Fentons, as they'd retired just before the League formation. The older heroes that had fought them are either dead or in retirement.
They know Superman's weakness, they know how to deal with Flash, they can even handle Wonder Woman. Whatever hero the Justice League throws at them, they know exactly what to do.
They are Batman levels of insanely prepared, but with the insanity to be just unpredictable enough that Batman can't tell his friends how to work around the Fenton's plans.
Meanwhile, Jack and Maddie have managed to find out that their baby boy is not being held by the GIW. In fact, it looks like he's gone to ground, smart boy that he is.
They track him to his last known location.
Gotham.
In Gotham, Jason snaps at the street kid he'd taken in to hold the fuck still, since stitches were hard. Danny tries, but stitches feel weird and he's ticklish.
In Wayne Manor, Jazz stares down Bruce Wayne; conclusive evidence in front of her to prove he is Batman. She demands he finds her brother before her parents tear the world apart.
In the Bat Cave, Sam stares down Damian, and Tucker gets stared down by Alfred. They just wanted to find their friend, and what better way than a tracker on the BatMobile?