Curate, connect, and discover
Imagine the batkids accidentally kidnapping Danny. Like they see some black haired kid passed out by the bat mobile after patrol and they just stick him in the car without checking bc hey that’s probably one of the batkids and they’re in a hurry. They do a headcount and just completely gloss over him bc one of them is out doing something else (probably red hood) and they completely forgot. Literally no one realizes until Danny wakes up in the batcave and is like whaaaaaat the actual fuck. Just completely ridiculous hijinks
Or if you want to make it angsty, you can set it after Jason died but before Tim became Robin. Bruce, in a rush, hasn’t gotten used to one less number and Dick, who regularly hallucinates his brother (that’s a thing in the comics) doesn’t question it