The original comics? Which ones? In both origin stories, Hal goes to Oa in the middle of the plot and learns everything. How would it have worked without showing Oa?
Sorry, should have explained more. I meant may -- though I can't say if this would have appealed more or less -- Hal could have spend the first part of the film just on Earth as a GL before using Oa and the heavy space scene stuff. Let me try to break it down (using the elements already in the film) the best I can:
- Film opens with a Martin/Hal scene in the locker room before Martin's final flight. Gives the kid his jacket and some speech about "not being fearless but accepting your fear and moving past it." Martin dies trying to steer the plan away from a crowded Ferris airfield, dying an obvious hero. Scene ends with Hal staring at the wreckage clutching his father's jacket.
- Film title opens (not with all the crazy green construct effects; more akin to Iron Man's)
- First 15 minutes are all about Hal being a pilot recently kicked out of the Air Force and going to Ferris air for a job. Reunites with Carol (who he hasn't seen since he was a kid). Her dad gives him a job not as a pilot but as a mechanic. He meets Tom
- Hal is driving away from a meeting with his fam (same scenario from the film) and is caught by the GL ring searching for a replacement. We hear Abin's voice detailing who he is, why he was chosen, etc, etc (Hal Jordan, you have the ability to overcome great fear...)
- Hal/Abin scene unfolds (and without the audience previously seeing any aliens their reaction should be influences by Hal's)
- Abin dies, Hal gets ring. Puts it on as Abin instructed and his suit appears. we get a Secret Origins scene where Hal is freaking out, ends up sloppily flying around and crashing into things. The sentient ring begins explaining things to him sporatically.
- Hector is introduced. Find's Abin's body on behalf of the governemnt. Gets infected right away.
- Hal goes into action the first time saving a crashing plane at Ferris. 20 min or so shows Hal back and forth between GL form and his regular job, trying to come to terms with the ring, battery and all that.
- Hammnd finds Hal (he "feels" Hal's thoughts around the crash site and wants to know what Hal knows). Sinestro shows up to help Hal beat Hammond.
- Hal and Sinestro talk, he warns Hal that a greater threat - the one that killed Aibin - is more important than whatever Hal has on Earth at the time. Sinestro takes Hal to Oa to train/prepare for Parallax's arrival (third act)
- 10 minutes of the movie they all fight and Hal is the one to imprison Parallax (Emerald Dawn like scene where, though the rings don't work against yellow, Hal finds a way around it)
- Hal meets the Guardians who decide he is worthy to be Abins successor. He returns to Earth even though Sinestro and Kilowog say he needs more training
- Final scene, no idea lol But Carol should definitely not know Hal's identity.
I'm not a screenwriter, but I'm starting to think having two thirds of the film grounded on Earth before all the space stuff would have make it flow better.
And, yes, I know that in the origin comics Hal goes to Oa to train but he then spends a whole lotta time just on Earth.