Exactly, so we can say that Bao is clowns and Joker expert (besides Jason of course). His main mission related to Joker. I think Joker has no or at least little relation to Teen Titans? Dick or other Titans has no reason to ask help from Bao about "the evil that destroyed their team and school" if the said evil is not Joker or his goons.
But I also think that Damian is not likely become Red X. My prediction Red X is completely new person with new identity. They created new character for Wonder Woman, so why not for Red X?