In
DC Comics, Doomsday is the name of the
villain responsible for killing Superman. Doomsday is the result of an
alien genetic experiment conducted hundreds of thousands of years ago. A nearly
indestructible, unstoppable creature, Doomsday was designed to be the top of the
evolutionary scale. After he escaped his underground
prison, Doomsday headed towards
Metropolis, leaving a trail of
destruction in his wake.
After an extended
battle that left the
Justice League of America and Metropolis in ruins, Superman managed to stop Doomsday at the seeming cost of Superman’s own life.
Superman has battled Doomsday twice more. The second meeting left Doomsday stranded at the end of time. The last time, Superman and the new Justice League of America had to stop Doomsday after
Brainiac took control of him.
On a side note, many comic book Superman fans were
pissed at the thought that a totally new, unheard of villain, which Doomsday was at the time, being able to kill Superman. Most agreed that if Superman should perish, it should be at the hands of one of his old foes, like
Lex Luthor.