Published
March 1999
Superman and Superboy head to Justice League headquarters to see everyone huddling around the dead body of... Superboy? From another place in Hypertime, the dying Teen of Steel leaves this world with a warning and an atomic power jacket tuned to his DNA. In order to get to the bottom of this, our Kid has to go where no Superboy has gone before...
Key Facts
- 2nd cameo appearance of a clone of Superboy who later takes the name Black Zero
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