Ever since they announced a Justice League movie, rumors been swarming that John Stewart would be featured as Green Lantern in the DC Cinematic Universe. I assume this is because this generation of movie-goers grew up with the Justice League Unlimited cartoon, which used John Stewart to be GL.
But it would be a major mistake, and a disgrace, to feature John Stewart as the 1st GL in the movies. Hal Jordan is the best option.
In case you don't know who he is, here's some basic info for you:
In October, 1959, a test pilot named Hal Jordan appeared in Showcase #22 as the first Green Lantern. ( Not including Alan Scott. Hes a TOTALLY different person.) He became the first earthling to be in the Green Lantern Corps, an intergalactic police force.
Why should Hal Jordan be the Green Lantern of the DC Cinematic Universe?
Hes a founding member of the Justice League
He was the first Green Lantern
He is the most prominent and important Green Lantern in the comics
He is best known as the greatest Green Lantern ever and still is in the comics
Hes just fucking awesome.