From Green Lantern Corps Wiki
 | GREEN LANTERN (SUPERMAN & BATMAN: GENERATIONS) [Kyle Rayner] |  |
| Created by John Byrne |
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HISTORY
After Superman was banished into the Phantom Zone for the murder of Lex Luthor, the heroes of Earth took precautions to prevent anyone from trying to get inside Lex Luthor's lair to steal the late villain's secrets. Green Lantern Alan Scott sealed the entire tower in his power ring's mystical green flame.
Alan Scott retired in the mid 1990s, he gave his mystical power ring to his chosen successor, Kyle Rayner.
Over the years, people tried and failed to cut through the emerald energy surrounding Luthor's lair. Green Lantern and Knightwing decided to leave evidence of the failed attempts to show how futile it was.
In 1999, the Green Lantern was contacted by Knightwing to remove the emerald energy barrier and permit entry into Luthor's lair. Superman had returned from the Phantom Zone and was accompanied by Batman in the hopes of finding a way to reverse the effects of gold kryptonite. Green Lantern used the ring to probe the tower layer by layer until the antidote was found. Once his powers were returned, Superman recreated the formula to give Knightwing, his true grandson, super powers as well. - Superman & Batman: Generations #4
CHRONOLOGY
For a definitive list of appearances of Green Lantern (Superman & Batman: Generations) in chronological order click here
