It was meant to be a joke, Dick thought it would be funny to make Batman and Robin scarier for Halloween. He wanted the villains to fear and pray for their lives, when they saw the Bat and the Bird. It became a tradition, that on every Halloween the Bats would become scarier.
Lady Gotham loved the idea of her protectors becoming scarier on Halloween. So she decided to add a little thing to the fear factor. Every time it's Halloween, the bats are no longer humans, but something completely different. And after every Halloween the bats become less and less humans. It wasn't a joke anymore.
What if Bruce was actually royalty. Bruce hasn't been seen after his parents' death, by both Royals and normal people. Besides gothamites, they aren't snitch and don't know anything about a prince.
But after decades of not being seen (besides in Gotham) he appears at a royal get together with kids. A lot of kids.
Okay but imagine the Royal families not knowing where he is (besides the Queen, because of Alfred) and then he just shows up with kids that can speak every language in the room. AND THEY ARE FOR SURE HIS CHILDREN. Now the question is who is the wife?
What I find the most funny, with this idea is the Royal kids meeting and interacting with the batkids. It would be pure chaos nothing more, just Chaos.
What if Bruce was thrown into an AU where his parents are alive, he has a wife, he's not batman but the JL is still a thing and the batkids don't exist.
Just imagine how furious he would be when he can't find his children, HIS CHILDREN. yes he has his parents back but what good does that do when he can't show them his children. His most valuable think in the entire world is gone, and he is furious about it.
Also just him seeing how shitty Gotham is doing without her Protectors, her Knight.
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Cut to Bruce trying to convince the JL to help him get home, cuz he has no Batcave and no armor
Hal: So you're saying that, you, YOU, billionaire Bruce Wayne willingly dresses up as a bat to fight crime at night, in the most dangerous and cursed city in the entire world. Yeah not buying that
Bruce:...
Wife: Brucie baby, are you sure you're okay?
Thomas: Son, I really think you need a hospital
Martha: My poor baby
Bruce: your real name is Hal Jordan, Flash's name is Barry Allen, Superman's name is Clark Kent, Green Arrow is Oliver queen and his wife is the Black Canary, do you want me to go on or are you fools going to help me get home to my kids!