Minor spoiler if you haven't read JUSTICE LEAGUE #30 and #31.
After the events of FOREVER EVIL and Nightwing's identity being publicly exposed, Lex Luthor has discovered one of the biggest secrets in the DC Universe--he knows Batman's secret identity. Lex appears to now want to do good after helping save the day in FOREVER EVIL, but this is Lex Luthor we're talking about. He approached Bruce Wayne about his discovery.
Is this a new Lex Luthor we're seeing or is he up to something, as usual?