We're going back into film, though this time it's a review. To put things in perspective, this film has been SIXTEEN YEARS in the making. There have been ideas of developing a Deadpool movie since 2000, with differing studios tossing the concept back and forth. After a lot of BS, a draft script was completed in 2010. According to Reynolds, the only reason the green-light was given was because of a leak of test footage, and its subsequent reception by the public.
The marketing for this film has been brilliant. Deadpool posters have been springing up for months and the pre-trailers were great. I will admit that while I am a Marvel and DC universe fan (you can like both!), Deadpool has never been one of the characters that I've really followed. In saying that, I know he's been quite 'meta' since inception. And juvenile. And therefore funny, in a fart-joke kinda way.
Let's start with the basics - The characters. Ryan Reynolds finally gets to play the Deadpool that we never got to see in the awful steaming-poo emoji that was X-Men Origins: Wolverine. This guy is a smart-assed, wise-cracking, gun-toting, popular-referencing badass that is hilariously inappropriate. And unlike Juno (from Juno...), the lines don't feel like they were written by someone far older and funnier than the character saying them.
Reynolds is paired next to Morena Baccarin's Vanessa, a...hooker? I think...who is also a wise-cracking fire-cracker, T. J. Miller's Weasel, token British bad-dude Ed Skrein, X-men Colossus (Stefan Kapicic) and Negasonic Teenage Warhead/Moody Teen (Brianna Hildebrand), all of whom have their fair share of funnies to bring to the table.
The plot is Deadpool's origin story. The trailers' will have told you the gist, so mentioning it here isn't going to ruin much. Man is badass, man falls for girl, man gets terminal cancer, man joins super-human programme, shit goes bad, man breaks out and goes on revenge spree. You know, the usual. Simply put, the plot it not why you'll see this movie. If you've seen the trailers, you know the plot. The reason you'll see it is because it's what superhero films generally aren't. Deadpool is violent, yet quite humorous. Deadpool talks to the audience and references Ryan Reynolds' career/mistakes (his words). It's also quite graphic, so don't take the kids.
True to the comics, Deadpool doesn't take itself seriously. And as so many people have mentioned, it has the best cameo that Stan Lee has ever done. Hands down. Think Hugh Hefner with neon lights. There is also some serious breaking of the fourth wall in this film, which makes it quite special in the Marvel franchise.
I may be parroting some of the other reviews that you've read, but to be honest - there isn't much more to say. It's good, so if you like juvenile humour, don't mind seeing bullets go through people, and aren't offended by a little nudity...go see it. I'd say it is the best Marvel film to date.
It seriously does shit on X-Men Origins: Wolverine, though. Worth it for that alone.