Let's reacquaint ourselves with the combatants:
Deadpool/Wade Wilson is a Marvel Comics character created by Fabian Nicieza and Rob Leifeld as a villain for the X-Men comic series. His first appearance was "New Mutants #98" in February, 1991, and has become a recurring character in several other titles including a few of his own.
Originally an homage (or rip-off, depending on who you ask) of Deathstroke/Slade Wilson from DC's "Teen Titans" comics, he slowly became his own distinct character. The 1997 "Deadpool" title, written by Joe Kelly, introduced the post-modernist and comedic elements that the character is known for today, at the same time beginning to build up the cult following that has finally broken into the mainstream of geekdom.
Deadpool has been portrayed by Nolan North in all animated and video game appearances except for X-Men Legends II and the two Marvel Ultimate Alliance games (where he was played by John Kassir), Marvel Super Hero Squad Online (where he was played by Tom Kenny), and an episode of Ultimate Spider-Man (where he was voiced by Will Friedle).
In the 2009 film "X-Men Origins: Wolverine," Wade Wilson was portrayed by Ryan Reynolds. In spite of fan misunderstanding and subsequent poor reaction to the character's mind-controlled transition phase "Weapon X-1" in the film's climax, Reynolds has been working with several different writers and directors trying to get a live-action Deadpool movie to the screen with the character fully-realized. In 2011, test footage was shot with Reynolds as Deadpool using motion-capture to recreate the expressive nature of Deadpool's mask and pitched to 20th Century Fox. In 2014, a clip of this test footage was leaked to the internet, possibly to drum up fan support and let Fox see the demand. Reactions have been overall very favorable.
Catwoman/Selina Kyle is a DC Comics character created by Bob Kane and Bill Finger for the Batman comic series. Her first appearance was "Batman #1" in the spring of 1940, where she was known as "The Cat."
Partially inspired by Kane's cousin Ruth Steel and actress Jean Harlow, Catwoman was introduced to add sex appeal for male readers, and as an interesting draw for female readers. Her character was to give dramatic and romantic tension to the series, as she and Batman are romantically perfectly suited for each other except that they are on opposite sides of the law. Her flip-flopping between anti-heroism and pure villainy (only in larceny - she was never a killer) began after an extended hiatus in the 1950s and early 1960s due to issues with the Comic's Code and portrayal of female characters. However, she remained a popular villain with fans and is typically considered second only to The Joker in a list of Batman's greatest rogues.
Catwoman appears sooner or later in most adaptations of the Batman mythos. She has been portrayed in various media by (in no particular order): Julie Newmar, Eartha Kitt, Lee Meriwether, Maggie Biard, Camren Bicondova, Jane Webb, Melendy Britt, Adrienne Barbeau, Gina Gershon, Nika Futterman, Stephanie Sheh, Michelle Pfieffer, Anne Hathaway, Eliza Dushku, Tress MacNielle, Vanessa Marshall, Brenda Barrie, P.J. Mattson, Kelly Huston, Grey DeLisle, Katherine Von Till, and Lorelei King. In 2004, a Catwoman movie was released staring Hallie Berry, but as a completely different character than Selina Kyle and thus was an In-Name-Only adaptation (because of this and other issues, the film is very poorly regarded).
While Catwoman has her rather impressive tenure on her side, the recently-leaked Deadpool test footage has put the Merc with the Mouth squarely in the public's eye.
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