As Tom King's "Knightmares" story arc in the Batman ongoing comic book series continues next week, the writer shared a concept cover from the series.Posted on King's Twitter account, the unused cover is illustrated by Mikel Janin, King's collaborator on "The War of Jokes and Riddles." As a concept cover, the issue numbering does not accurately reflect what issue the cover is actually for. On the cover, Batman is seen riding a horse through a desert, ominously dragging a coffin behind him.RELATED: Jim Lee's Detective Comics Variants Pit Batman Against Joker, Harley Quinn

While it is unknown if the cover for the issue in question was meant to be a part of the "Knightmares" story arc, given the story's trend of featuring hallucinatory tales, the body in the casket could either represent an upcoming death or one of a character long-dead continuing to haunt Bruce Wayne.

Whatever the case, the rejected cover teases a solitary journey for the Dark Knight and one heavily informed by death sometime in the future of King's run.

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Batman #66 is written by Tom King and illustrated by Jorge Fornes. It is scheduled to go on sale on March 6 from DC Comics.