I've Googled around and searched through this forum and still can't find an answer to this question: Does anyone know what betraying your mentor in your final mentor mission actually does? I've only just finished the last Joker mission on my villain character, and at the end I was given the option of saving or betraying The Joker. I decided to betray him (as that's what he'd do!) and he threatened me of course, but then once I was back in the Hall Of Doom he acted like nothing had changed and invited me to the Society. I guess you could expect that kind of flip-floppery from The Joker, but I'm assuming Lex Luthor and Circe do the same. So is this just purely for decoration/RP, or is there something else to the opportunity for betrayal?