Maybe that would work better. Part of me just wants to be able to jump to the Sinestro Corps War as quickly as possible. We definitely still need to have Hal seeing Sinestro act brutally in the search. Perhaps have Sinestro comment on how disorderly Earth is, and that if they were on his world things would be different. Then have Sinestro be evasive when Hal asks what he means by that.
I hear you. Seeing the Sinestro Corps War on the big screen would've been awesome. I think one of the problems with Green Lantern is that they've got a lot of big epic story lines and a deep mythology and I wouldn't be sure where to start. You had Legion, Parallax, Manhunters, Sinestro, the Sinestro Corps, Black Hand, Hector Hammond, Atrocitus, Star Sapphire, and the Black Lanterns (not to mention the other ring corps), and the Blackest Night. Where in the world do you start? And how can you weave that into a film trilogy, at the least?
I would like to see all of them in Green Lantern films. Though I do think it was a mistake to start with Parallax. I think you work up to a villain on that level. He would've been the last villain, or next to last, closing out the Lantern series with Blackest Night/Brightest Day.