I can't say I know all about every Green Lantern hero since its inception, but knew enough to know that this particular hero was worth a look on DVD. Well, I'm very glad I bought it and it is a welcome addition to my collection. I bought it recently and already watched it several times.
Some might have a problem with it's lack of origin development, but I think the "quick get things started right away" choice was a good one in this case. The animation/art design worked, and shined in many places. The music was gripping and emotive, and added to the intensity of the Green Lantern story, the mystique, the sheer epic nature of the tale. And of course, we come to the rings. There must have been over 20 different uses of the ring's power. No spoilers here, you will have to watch and enjoy discovering how the rings get used for yourself. The movie is fun and far out while remaining understandable, but is very violent and gory at times, so it is not really suited for young children. That said, if you like superhero stories but don't want to wade through the comic books to get your satisfaction, DC has made several comic book hero movies worth your time, and Green Lantern: First Flight is undoubtedly one of them.