Any movie sponsored, or that is a part of Marvel(even if it's under 20th century fox instead of Disney) has characters that have been in comics. Deadpool is a bit...alternative to most heros. His first comic wasn't until 1990.
In the movies he was introduced in X-men origins, but deadpool wasn't really deadpool in that movie. It was a bit of a disappointment.
They've basically written over that version of Wade Wilson. And since it's Deadpool who routinely breaks the 4th wall, it honestly doesn't matter that much.
I thought the way they nodded to that deadpool was funny in the first movie... but in DP2 they did a far better, more fitting "salute" to that version.
Saw it and loved it.
The kid acting in the movie was absolutely hideous... but getting beyond that, Cable was outstanding and DP was funny as hell.
The story was good, the ending was a little weak, Domino was a surprise in that her character was well played and well used.
Juggernaut was just ok, Collossus was pretty good, Negasonic non existent.
Gonna go 8 of 10 and it will probably go up a little upon further viewings... the devil is in the details... for example, they re-visit a throwaway joke from DP concerning his old apartment and roommate that I found extremely funny.