#The Ganthet part was from one passing comment but I ran with it here

[gr1555]

I love the idea of the entire magic community knowing Billy and his siblings are children (well besides Mary in current continuity) but instead of telling anyone they help them mess with the rest of the super hero community.

Like John and Billy will never interact only to mention John being at the rock of eternity one time but the moment any JL member asks about it the two of them will start spewing the absolutely craziest stories imaginable that are too confusing for anyone to question. The Justice League thinks they're either friends or hate each other when in reality neither really cares about the other they just both like messing with the JL.

Zatanna will make comments about being really good friends with Mary and training/learning magic with her leaving the JL to assume it was when they were both younger.

The Spectre and Phantom Stranger will mention them being connected to a team of ancient super powerful individuals. One day one of the GLs or Superman spots the two of them, Zatanna and Fate having breakfast with Captain Marvel and Mary on the moon.

They'll ask Doctor Fate about it and he'll just be like, "Oh yeah, I knew them before they joined the JL. Both our parents were archeologists. Their mentor was a Lord of Order. One of their dead brothers is connected to the lords of chaos." Or he'll just stare at them like their dumb and vanish.

This has also caused many of them to be confused about the magic community in general.

The real tipping point though is when the guardians overhear earths GLs discussing a recent mission and mention a member of the Marvel Family only for Ganthet to be like "oh Shazam and his kids, yeah I know them. I visit the rock of eternity all the time. What trouble did they get into now."

Batman hates it, especially since Freddy figured out his identity nearly instantly but all Bruce can find about them is confusing chaos. Like none of the magic community directly lies but are also very misleading with the truth and only correct them in ways that would lead to more confusion and misunderstandings.