Prior to this battle, Lex Luthor was declared Prseident after Darkseid's attack on earth in the Justice League movie. He was rebuilding America with oil found in the Mexican Gulf where he found a spaceship. He was warned by Superman who offered to throw it into the sun as it had Kryptonian on the side but Lex had it opened releasing Doomsday. Superman was not present in Metropolis and was in Afghanistan with Lois Lane as Clark Kent reporting on a new fighter jet, the Typhoon Mark II the fastest jet in the world.
12:42 - Doomsday is released from his inprisonment and kills the research team.
13:26 - The Justice League (Green Lanter, Martian Manhunter, Flash and Wonder Woman) confront Doomsday.
13:45 - Doomsday has defeated the Justice League.
14:31 - Superman arrives and confronts Doomsday.
15:02 - Superman freezes Doomsday but it breaks out.
15:18 - The fight goes underground.
16:56 - Doomsday throws Superman into the Daily Planet globe, knocking it to the ground.
19:30 - A sun soaked Superman and Doomsday punch each other simultaenesouly killing Doomsday.
19:32 - Lois Lane arrives and holds Superman in her arms as he dies, where he reveals his identity to her.
You can read my Part 1 screen play for my movie on my fansite title "Death of Superman (screenplay Part 1)". I am currently writing Part 2 as I create this article in which it will be the Superman fight and funeral with Part 3 the ending of the film re-introducing Brainiac as he reboots. Hope you enjoy this little teaser..