GL and Deadpool are DC and Marvel. Plus they are two completely different characters. I don't think the GA would care too much, I don't think they'd watch GL and be like “Hey that's Deadpool!” or watch Deadpool and be like “Hey that's Hal Jordan!”.

And comic book fans won't mind Reynolds because he is admittedly a comic book fan himself. He's been wanting to make Deadpool for like 7 years, he wouldn't just drop it once it's finally green lit. And why not take the G.L role whilst Deadpool still gets a script together or whatever?

GL is ready to go basically. Filming starts January next year. It's be released in 2011. And Deadpool was never gonna come out before 2012 regardless of GL I don't think. Reynolds has just done what a young actor with his star on the rise should do. Get big roles.

also Wesley Snipes wanted to play Black Panther when he did Blade 3 but director David S. Goyer said that Wesley Snipes would not likely be Black Panther. “He's already so entrenched as Blade that another Marvel hero might be overkill,” said Goyer.

so its true if RR does Green Lantern and Deadpool its a overkill, he already was in Blade 3, Wolverine and now a Green Lantern and Deadpool movie. im a comicbook fan myself but if i was a actor i wont do all these comicbook movies from Marvel and DC.