We can't tell you much about this issue without ruining some of ACTION COMICS #900's surprises, but suffice it to say, Doomsday's back - and you've never seen him like this before! Doomsday's first appearance brought about the 'Reign of the Supermen,' where four characters - Superboy, Steel, Cyborg Superman, and Eradicator - came onto the scene to try to fill Superman's shoes. Now, with 'Reign of Doomsday,' it looks like Superman might need to fill their shoes!
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