User blog comment:Thailog/Ep. 201 "Happy New Year!" discussion/@comment-24.131.105.61-20120429222127/@comment-4803933-20120429225550

Nightwing's decision to remain on the team could easily be explained in two ways. First being that I'm pretty sure Dick Grayson's only time as part of the JL in any continuity was when he was the Batman. Second being that the Team doesn't appear to have any good candidates to take over as leader, except for maybe the new Robin and there's a strong possibility that he hasn't been around all that long yet.