(To preface this, I am a Green Lantern fan, and have been for as long as I have read comic books, so on with the review.)
Some movies are made just to sell toys, and this is one of them. Underdeveloped characters, underdeveloped relationships, gaping plot holes, and a movie in a bad need of a good rewrite, plague DC Comics first cinematic foray outside the Batman-Superman franchises, making Green Lantern possibly the last DC movie other than Batman or Superman we will see for a while.
The Green Lanterns are intergalactic police officers, and Earthling Hal Jordan just so happens to be the first human chosen to join their ranks, but alas an evil is brewing in the farthest reaches of space, and Hal must learn how to master his newfound powers, or else... You probably know what will happen next.
Green Lantern wants to adhere to the superhero movie formula, but it does so with little charm, little wit, and not a lot in terms of flow from one scene to the other. Not to mention, characters come and go with no sense of where they came from or where they went when not onscreen. Should we care about Peter Sarsgaard's villain, Hector Hammond? His character is not even introduced till the second act and by then it is like, "Who is this guy, and why should I care when he becomes the psychotic villain?" Then there is star, Ryan Reynolds, who obviously cared about the source material, giving Hal Jordan his all, but when you're in a movie that simply wants to try and get to the next action set piece as fast as possible so that they can satisfy the seven-year-old who is going to buy the toys, it is hard to have much to toy with (like that pun?). The action is impressive, but when the story is just a bullet point, cliff note version of the larger, more expansive mythology that this comic book character boasts, one can see why Green Lantern suffers in translation.
I give Green Lantern an F!