Green Lantern vs who now?

I just received the official description of Green Lantern's plot (no, I don't have "sources"...yes, this was sent as a mass mailing to many other people). I haven't seen this information yet anywhere out there in the blog-o-verse (but I didn't try very hard). Is everyone aware that the official synopsis is

In a universe as vast as it is mysterious, a small but powerful force has existed for centuries. Protectors of peace and justice, they are called the Green Lantern Corps. A
brotherhood of warriors sworn to keep intergalactic order, each Green Lantern wears a ring that grants him superpowers. But when a new enemy called Parallax threatens to destroy the balance of power in the Universe, their fate and the fate of Earth lie in the hands of their newest recruit, the first human ever selected: Hal Jordan (Ryan Reynolds).

Hal is a gifted and cocky test pilot, but the Green Lanterns have little respect for
humans, who have never harnessed the infinite powers of the ring before. But Hal is
clearly the missing piece to the puzzle, and along with his determination and willpower, he has one thing no member of the Corps has ever had: humanity. With the encouragement of fellow pilot and childhood sweetheart Carol Ferris (Blake Lively), if Hal can quickly master his new powers and find the courage to overcome his fears, he may prove to be not only the key to defeating Parallax…he will become the greatest Green Lantern of all."

So, they're going to use Parallax in the first movie? In using the internets to research the origins of Parallax (remember, I'm a Marvel zombie, not a DC Dunderhead...I kid because I love), I discovered two things. First, parallax apparently started off as some kind of "impurity" or "thing." I don't get it, but apparently it was both the thing that gave the Green Lantern ring vulnerability AND later became the villain Parallax. Although I doubt anyone who has read to this point will consider the following a spoiler, be warned if somehow you've managed to blunder your way this far without knowing that (gasp) Hal Jordan was Parallax. I don't know who Hal Jordan's first villain was in the comic books, but I know it wasn't himself. I have no idea how they're going to incorporate this. Are they basically doing what Fantastic Four 2 did to Galactus (meaning castrating the character into lameness) or is there some way in which this can work? I'd love some input from DC lovers who know better than I do.

The second thing I found on the internets was this:
I'm going to say it: Ryan Reynolds has really lost a step.

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