DC Comics Rebirth for Superman in Action Comics #987 for The Oz Effect Part 1 follows.
We finally learn who Mr. Oz is in Action Comics #987. Superman confronts Mr. Oz who reveals himself to be…
…Superman’s father Jor-el!
In two weeks we learn how he survived the explosion of Krypton.
It is also possible that Mr. Oz only wants Superman to believe he’s Jor-el so the story may not be over about Who Is Mr. Oz?