Sheep Cannon wrote:
As far as getting the gist of the characters for the film Secret Origins is your top priority. Mongo pretty much listed off everything and about the only thing I can add to it is that since Geoff Johns has been on GL for a few years now and never took a break it should make it somewhat easier to narrow down what books to buy. As far as the Green Lantern Corps. series goes you don't have to read it, but it does flesh out Oa and if your looking for Guy Gardner, Kyle Rayner and John Stewart then this is the book where you'll see them.
Yeah, as far as understanding everything with Hal Jordan you don't have to read the corps title, but I found that I didn't enjoy the Sinestro War crossover event until I had.