The discussion about Leviathan is pretty funny given Bendis' words on the interview about the Legion

Bendis: For those who are worried, it's a character that can leave the DC Universe and walk a thousand years, and not mess up your favorite comics. Right away, I just want to let the Reddit people know. Immediately, they think it's their favorite character and I'll destroy their book. Wait 'til you find out, I will say it's a character that I'm writing right now. It's someone who I get to tee up to the walk. Almost like it was planned nicely...!