You were helping your dad, Batman, damily, the batfamily, and the justice League fight off some new villains in Gotham that had all come together in one big group, including the top villains like Scarecrow, Killermoth, and even the Joker. A bunch of other Heroes had their kids/sidekicks with them fighting as well and most were your friends so naturally you were all trying to help one another well that was until-

Maniacal laughter

"So who's this little one Brucey~?" the Joker taunts as he grabs one of the other kids (you can pick who it is) and dangles them over the roofedge