I dunno,I like Cooper - but he doesnt scream HAL to me..I think hed be a better guy gardner.
Im thinking that Reynolds will be a good Hal but with a bit of Kyle Rayner thrown in...sorta like they did on SUPERMAN The Animated series "In Brightest day" where they merged the characters
I think Bradley Cooper would be more fun to watch as GL. I really do. I'm not a Reynolds hater. I just think there'd be something more intriguing with Cooper in the role.