Remembering what Kanan does of the bent old man, focused on revenge and with nothing else but that and stealing an apprentice to his time, it's not the highest bar to beat. He doesn't share any of that because what details Maul doesn't know, he's better off not knowing.

Hi I Have Become Far Greater than I Ever Could Back in the Galaxy, I'm Dead.

Mmmmm, not the time for that joke.

"Good to know. We could all use better," Kanan says, "Anyone besides you and me here?"

He's sure there is. Less sure Maul will share.