C2074 He Wanted to Turn Batman into Yellow Lantern
In terms of exposing the Little Blue People, Sinestro was the only one who could do so, if not for the possibility of the "vision disparity demon Hal Jordan " appearing in the Timeway.
After all, this person would firmly betray the Green Light Legion and choose to become the leader of the Yellow Light Legion in most of the Timeways.
Even though the "change of fate" had not appeared yet
