Barry: I... I need to run back into the timestream but...
Barry: I see Three Timelines. Why? (Vertigo, Wildstorm and DCU)
Pandora: Because the History of Heroes was shattered into three long ago.
Pandora: Splintered to weaken your world for their impending arrival
Pandora: You must stand together. The Timelines must become one.
Pandora: You can help me fix that Barry but at a cost.
What was the cost and did it go away when she was killed? Who are the THEY that she spoke of? Did THEY kill her? Are they Manhattan and OZ or Apocalypse. Was the world Strengthened? (They kicked Darkseid's ass.) We still haven't answered all the questions from Flashpoint yet here's Both Convergence and Rebirth asking a ton more.