After watching Green Lantern again I still believe this movie wasn't as bad as people made it out to be and the franchise could've easily been salvaged.
It has good elements and it's a shame such a great Sinestro was wasted, but it's sort of like the JL movie where it feels like too many cooks and it got hurt in the editing as well so the final product doesn't seem to be what I think it was supposed to be.
I did like the bio weapon look of the suits. It's something Johns was going for in the comics but seeing it live was cool. It helped me reimagine how the GLs powers operate. I think the special effects for some of the aliens was cool (Tomar Re, Kilowog), the constructs looked cool.
But it felt barebones, like too much studio interference. Storylines started but dropped (or unnecessary changes-- having Hal's father survive the crash only for the plane to explode moments later defeats the point, and how could Hal get so far as a test pilot but still have panic attacks in the air?), other plot points just thrown in (at no point did this version of Sinestro seem to be power hungry that he'd go for the yellow ring, but they thew that weird end scene in there); extra villains that didn't fit in, and Parallax as an impersonal cloud monster just didn't work.
There was a much better sci fi epic in there somewhere. Also, I'm a big proponent of having humans react proportionately when they find themselves on an alien planet, like that in and of itself would be a life changing event, but Hal adapts in moments.
Like JL, just a really messy movie imo. But like X-Men last stand, it's re-watchable from a turn-your-brain-off kind of way once you know it's bad and can enjoy it for some of the comic booky action and visuals.