Numerous clones of Long Shadow and the Ultimen appear in "Panic in the Sky" when Galatea and the Ultimen army attack the Watchtower.
While Jemm recovered at the JLA Watchtower, a delegation of Saturnians arrived to reclaim the prince.
In the Watchtower, Batman informs the others that if a danger like this should happen again, they would be there.
Ro's pre-Crisis background still exists, however, as his Gamma Gong is kept in the Justice League Watchtower's trophy room.
As Mageddon enters Earth's solar system, a second spore forms around Lex Luthor, who has formed another version of the Injustice Gang (Prometheus, the General and an alien Queen Bee called Zazzala) and attacks the Watchtower, not knowing he is actually being controlled by the weapon.
A picture of him appears in the two-parted Batman Beyond episode "The Call," where he's shown on a computer screen in the Justice League Watchtower along with Big Barda.
Plastic Man radios in from Justice League Watchtower informing the team that all fireballs had been destroyed but they were unable to get a read on what exactly they were.
Green Arrow supported her decision and they both journeyed to the Justice League Headquarters to use the Transmatter Machine, the device used to travel from Earth-One to Earth-Two.
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