JLA #91 (2004)

Extinction, Part 1: The Homecoming
The Watchtower is hit with a meteor storm, which seems to have been caused by a spacecraft arriving from a different part of space. The pilot is a shapeshifting alien, sent to check on the developmental progress of the silver masked monkey, a species nearing extinction. He does not react well when he witnesses the death of what is likely the last wild member of this species.
Release Date: 2004