Batman / Superman Annual #1

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How did Superman and Batman discover each other's secret identities? Why was Deathstroke after Bruce Wayne on one of his earliest assignments? How do Ultraman and Owlman fit into this? And why are they all on a cruise into the Bermuda Triangle?

The answers will shock and amaze in this far-out reimagining of one of the first meetings between the Man of Steel and the Caped Crusader!