WB had big plans, and when GREEN LANTERN flopped, they were all scrapped.
GREEN LANTERN 2, which featured Hal Jordan rallying the Green Lantern Corps to face Sinestro and the Sinestro Corps, was entirely scrapped, nearly sinking Reynolds' career in the process, with low-scale dramas gave him a lifeline until DEADPOOL allowed him to bounce back into the big league.
Meanwhile, THE FLASH, which featured Barry Allen facing off against his mother's murderer, Eobard Thawne, a time-travelling speedster who became stranded in the past after a failed attempt to kill Barry as a child, and engineered his accident as part of an elaborate plan to return home, provided the basis for the popular CW TV show. Beforehand, WB had reached out to Bradley Cooper and Chris Pine to headline the movie as Barry Allen, with Reynolds set to make a cameo appearance as Green Lantern.
In the pangs of desperation, WB briefly tried to revive the JUSTICE LEAGUE project once again in 2012, after THE AVENGERS broken box office records, with a script written by Will Beall in which Superman, Batman, Wonder Woman, Flash and Green Lantern join forces to fend off Darkseid's invasion on Earth. However, the script was reportedly so subpar none of the directors they approached for the job, among them Ben Affleck, were interested.