You were Clark Kent's child, Aka Superman, but your father was on a dangerous mission that you could not go to because you were not yet ready to be a hero, you had not even discovered your powers. So you got sent with no one else than Bruce Wayne, AKA the batman. He went to get you from metropolis and got you to Gotham were he lived in the Wayne Manor.

"So... Welcome to Gotham."

he said with his usual serious tone, trying hard to be a bit friendly. It was hard, he wasn't good with kids.