What I need of the DPxDC "Bruce confuses Danny for one of his kids and accidentally kinda kidnaps him" is to have Danny's parents go absolute apeshit at someone taking their baby boy! their little guy! the most wonderful, most specialest boy ever!
and now whilst Bruce is just realising what's going on and trying to give Danny back, Jack and Maddie already went through half his rogues gallery looking for who could have taken their son! the villains are in shambles! the GCPD doesn't know if they are supervillains too since they are only targeting OTHER supervillains but anyway they Can Not Restrain Them
Danny sees that and just groans and sinks his head in his hands, defeated, and then hears all the cutesy names they are calling him with and wants to die (again) on the spot "our baby boy! our darling bombon! our little starlight!" (ok, he likes that one), "our sweet, sweet little boy!"
in the end, Danny is reunited with his parents, whom get fined for property damage and attacking cops (it was the cops' fault. acab), and they are hugging Danny and grumbling about the fine ("what did they expect? what parent wouldn't tear down the world for their child?" Jason, looking pointedly at Bruce: "yeah, what kind of AWFUL parent wouldn't?"), but they are understanding enough with Bruce, as it was a mix-up and Danny didn't say anything until later out of awkwardness (they judge his parenting if he cannot recognize he wasn't his kid. no matter that they cannot recognize Phantom as THEIR kid)
they leave, happy and relieved, and Bruce hopes they never really turn to supervillainy
once Jason finds out Maddie beat Joker to half an inch of his life (that clown is hard to kill!), he sneaks into their RV and adopts himself into their home. because i said so