well i was thinking, Batman will NOT be an easy fellow to bring into the league. It would still take considerable time for the league to have its own solid base of operations. If no one else wanted interaction with Nightwing, I could have Nightwing's suspicions of Luthor bring him to Lexcorp, where he might find Starfire, and who knows, Batman and Robin may pay a visit to see why a wingding was discovered at the scene of the Witchboy's death, this could bring Bats all the closer to possibly willingly join the league.