Rebirth outline in the hardcover collection of the story His resurrection is foreshadowed to occur in a near-future event, after which he would be responsible for Barry Allen's return and transformation into the Black Flash.
Rebirth outline in the hardcover collection of the story It is revealed that he would be resurrected in a near-future event, as his corpse is still buried in the present. He is apparently the one responsible for Barry's return and transformation into the Black Flash.