User blog comment:Dman6233/OT Live Action Teen Titans Series to air on DC Digital Service and be produced by Arrowverse writer, Greg Berlanti in 2018/@comment-4300738-20170427021457/@comment-4300738-20170427031855

I think the "Dark Knight" part of his line was more of a shout-out rather than 100% him saying that "Batman is dead". But the timeline has the potential to change regardless.

Then again, we really don't know what Geoff Johns or Berlanti have planned yet.