The perfect Green Lantern will be Sam Witwer from Smallville. I know you must be thinking that I am crazy but just look at him. He has the face and build for the role. He is in about his late 20s or early 30s which makes him even more perfect for the part. He has acting experience so its not like another Brandon Routh incident will reoccur. If not him then I guess Chris Pine is the best rumored choice, but he is not a better one than Sam Witwer. If Pine was given the role he would be paid a ridiculous amount of money and everyone will view him as Captain Kirk, not Green Lantern. Pine also looks nothing like the Green Lantern...
I have many more reasons why he should play the Green Lantern. I am so confident in this that I have even written a petition. Here's the link, read it and sign before you leave, I'm sure you will agree with me:

http://www.thepetitionsite.com/1/Sam-Witwer-the-perfect-green-lantern

my fav green lantern is HAL, but for a movie i think KYLE would work better, especially with the younger audiences, keeping it more entertaining.

BUT since they are going with HAL they should go more 'serious' tone, like BATMAN BEGINS. I also feel picking a method/semiknown actor will work best. JIM 'JESUS'CAVIZEL would be great for HAL. Maybe not the look, but the character!

they should be focusing on a wonder woman film thats what i wanna see

I don't care which if they use Kyle Rayner,Hal Jordan or John Stewart. DC should be really working harder on this, if they do intend to make a Justice League film.

The Green Lanterns a superhero? I thought he was a villian.