Batman / Superman #4

It's the Man of Steel's worst nightmare: an obsessed villain who not only knows all of Superman's secrets but is also willing to kill anyone who has ever stood by him! No one is safe when the one you're hunting has no discernible motive or pattern! Collects BATMAN/SUPERMAN #16-20, ANNUAL #2 and BATMAN/SUPERMAN: FUTURES END #1.

Characters: Alfred Pennyworth, Atom (Palmer), Atomic Skull (Michaels), Bane, Barbara Gordon, Batman, Brainiac, Carlos Gutierrez, Cheshire, Dame Kela-Van, Damian Wayne, Darkseid, Doomsday, Felicity Regan, General Ahmad, General Zod, Hector Hammond, Hope Taya, Jason Todd, Jimmy Olsen, Joker, Jor-El, Killer Croc, Krypto, Lana Lang, Lara Lor-Van, Lex Luthor, Lobo, Lois Lane, Man-Bat, Mara-Van, Metallo, Mongul the Elder, Perry White, Steel (John Henry Irons), Superboy (Kon-El), Supergirl (Kara Zor-El), Superman, Tali Zar, Tim Drake, Toymaster, William Cobb, Wonder Woman, Xa-Du, Zor-El