Deadpool is in theaters Friday, February 12th, 2016. So, maybe it's Valentine's Day with Ryan Reynolds. Something tells me that his Deadpool is going to be much more successful than his Green Lantern was.
There were a number of things wrong with Green Lantern. Very few of them were Ryan Reynolds' fault. I think he did his best to make lemonade. I have not seen him in Blade III yet, but I do believe that he delivers. I've enjoyed every movie I've seen him in.
Deadpool was created by Teen Titans fan Rob Liefeld and Fabian Nicieza. When Nicieza saw the character design, his reaction was, This is Deathstroke from The New Teen Titans.
"Slade" Joseph Wilson made his debut in The New Teen Titans #2. Created by Marv Wolfman and George Perez. His full name and title was Deathstroke, The Terminator. He was contracted by The H.I.V.E. to eliminate The New Teen Titans. He took the contract when his son, Grant, who took on the identity of The Ravager could not complete the task. Grant attempted to enhance himself in the same way his father had, but the affects burnt - or ravaged him - and he died prematurely.
Deathstroke was behind Tara Markov infiltrating The New Teen Titans as the elemental "hero" Terra. Tara is the somewhat estranged sister of Markovian monarch Brian Markov, also known as Geo-Force from Batman and The Outsiders. The legendary "The Judas Contract" had Terra take down the Titans and together they delivered them to The H.I.V.E. During The Judas Contract story line, Dick Grayson outgrew his Robin identity and became Nightwing - an homage to Superman's Kandor identity, which was a one-off of Batman. Wilson had another son, Joseph, who had the meta-human ability to "leap" into others; kind of like Deadman. When possessing others, Joseph took control of their motor skills as the hero Jericho.
Before relaunching The New Teen Titans with Wolfman, Perez worked with writer David Michelinie to create a villain in the pages of The Avengers.
The Taskmaster was a consummate athlete, hand-to-hand combatant and weapons master. He had photographic abilities. Any move he saw, he could copy without practice. He was like an updating of the classic Avengers adversary, The Super-Adaptoid. The Super Adaptoid was like the android created by T. O. Morrow, Amazo. Morrow had also created The Red Tornado; much like Hank Pym had created Ulton, who in turn created The Vision and Jocasta. In some ways, The Taskmaster was also like the ill-fated X-Man, Mimic.
The Taskmaster has been both an adversary and an unwilling ally of - wait for it - Deadpool.
Comics are full of one-off characters,
Superman is easily the most copied character. Captain (Shazam!) Marvel is a one-off.
Ultraman, part of Earth-3's Crime Syndicate is a one-off. So is Hyperion of Marvel's Squadron Supreme.
Even Bizarro is kind of a one-off, being that he's a mirror cracked, evil opposite version of Superman.