I agree with all your points there.xd yeah its ironic but i'm not sure how involved the actual comic studios are involved. I know Marvel is doing the deadpool with Reynolds and since he's Hal Jordan than obviously there wasn't a clause in his Marvel contract to keep him from doing DC movies.
well he's been in other movies, though before he got the GL part he was suppose to be The Flash but I think he fits better as Hal Jordan though he's definantly the perfect Deadpool and I can't wait for the Deadpool movie, he was the best part of Wolverine (before they destroyed the Deadpool canon)
Ryan Reynolds is a great actor and he plays the sarcastic role perfectly.
I think they may have ruined the Deadpool story tbh....the "Origin" will now need to be completely different to the comics.
It will probably be a prequel to Wolverine Imo.