This guy certainly looks the part, in fact I would argue that he may be a clone of Hal Jordan. Shawn Roberts is a spitting image of fan favorite Green Lantern. Shawn has just completed working with Campbell on "Edge of Darkness."
The guy is 25 and ripped which gives Campbell the age bracket he was looking to cast in.
It has been confirmed that Shawn has had several casting calls and two or three meetings with director Campbell regarding the Green Lantern role. From what I hear, Campbell loves the guy.
So it sounds like Mr. Roberts has the acting chops to turn in a successful performance and he definitely looks just like Hal Jordan. In my opinion it really boils down to Brian Austin Green and Shawn Roberts. Bradley Cooper is too old for the part and he looks nothing like Hal Jordan, in fact Bradley Cooper looks more like Hawk Man then GL.
I think Martin will make the right choice, we the fans will get a good, quality filled Green Lantern movie.