We all remember the plans to kill Dick off in Infinite Crisis, right? According to this article there were earlier plans to make him Batmans' greatest enemy. Granted this has been done in a couple Elseworlds stories so it doesn't shock me too much. Devin Grayson wrote the Nightwing arc where he became Renegade too. There was also a point where DC seemed too invested in making timelines like Kingdom Comes and Dark Knight mesh some with the main timeline. That's part of the plan here as both are talked about in this Crisis 2 idea.