In that story, Doomsday kills Superman, though later, multiple Superman jockey for his position in Metropolis.
It concludes with a figure emerging from the Kryptonian Regeneration Matrix, wearing a black-and-silver version of the classic Superman suit.
The “Black Suit” (also known as the Recovery Suit) surfaced when Kal-El returned from the dead in the classic “Death of Superman” storyline, from which Zack Snyder’s Batman v Superman drew.