"Are...are you like Superman?" One of them asks.
"Uhhhhhh no," if he admits to that there will be too much power overlap between that and Phantom, and someone's gonna make the connection. "I'm Atlantean. My family was banished like, what, two or three generations ago. I didn't really pay attention to it too much."
"Oh! I'm so sorry, I didn't mean to bring up bad blood."
"Nah, it wasn't anything super bad, but having an affair with an unmarried Royal will get almost anyone kicked from any country with a King or Queen."
Danny is, in fact, pulling this entirely out of his ass, basing it off of some historical lesson Clockwork had insisted on giving him.
Danny is also correct, and that's a real thing that happened in his family history; his father is the bastard brother of the previous Atlantean King. Not the current one and his brother, but the King before them, which makes Danny and Jazz their cousins, and Jack their uncle.
By saying this outloud, like it was no big deal, to someone he didn't realize was livestreaming, he's started the beginnings of a political upheaval in Atlantis.
There's a few people who still have issues with their current choices for King, and crave a different choice.
Different choices that don't know anything about any underwater politics and are impressionable teenagers, or a man that appears to be an absolute moron.
People, options, they think they can easily manipulate.
They did not take into account the sheer baggage that comes with Danny and Jazz's existence, or how neither of them particularly want anything to do with Atlantis at all.
They also aren't prepared, at all, for Jack Fenton.