Ron Marz stated that he was in the process of bringing the Corps back near the end of his run, which would have seen the Corps rebooted into a smaller group led by John Stewart and Ganthet as the Guardians. Unfortunatly his contract ran out, Judd Winick went another way and we had to wait till Rebirth to get a corps back.
Also by Marz was the elseworlds Green Lantern: Camelot in which The ENTIRE cast of Green Lantern would take place in the time of Camelot, with Alan Scott as King Arthur, Hal Jordan as Lancelot, and Ganthet as the Lady in the Lake (Marz: He has a dress!)
After losing his yellow Power Ring and after the Zero Hour crossover, then-current writer Beau Smith wanted to revamp Guy Gardner as an Indiana Jones-type hero (i.e., without his powers), but he was forced by editorial to add the Vuldarian shape-shifting powers. You can learn more here.
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