It would need a great director and a great script to make a decent Deadpool movie, as well as a great actor.
Have never read any of Thor. And this Deadpool is somewhat familiar from comics but the movie will propably ruin the whole thing. They can't cover Ryan's face that long so they will make him an unmasked one for sure.
Wade (Deadpool) is twisted as f*ck and funny as whole hell, his dialogues are just way too bi-polar and weird.
It needs someone that really has caught the essence of the character to make a good movie and script.
It probably will deal more with the Origins of Deadpool, that way Ryan can be un-masked because even the character says many times in the comics that he won't take his mask off (off course he does in some arcs but it's rare).
I've been buying the Deadpool classics and i'll buy the entire "Cable & Deadpool" collection, it has been a great read and Deadpool has fastly became one of my favorite characters.
Expect a crap movie but there's still some hope left, "Iron Man" for example turned out to be 2 fantastic movies, the first 2 movies of "Spider-Man" are pretty awesome as well, i mean not all the Marvel adaptations have been crap.