As the most prolific and arguably most beloved X-Man, there isn't much fans don't know about Wolverine.
The character made his debut in the pages of the Incredible Hulk and has since developed into one of the most famous fictional characters on the planet, holding down beloved stints on the X-Men, X-Force, and even as an Avenger in recent years. During this time he's amassed an incredible box-office draw, luring in viewers as the lead of Fox's old X-Men films and on dozens of animated cartoons and video games.
What I'm getting here is that Wolverine is the very definition of a known quantity. He's the X-Man everyone's familiar with and so there's not really that much out there that could be considered a surprise.
Or so you would think. You see, Wolverine has been through A LOT in the forty-or-so years since he made his comics debut, and that means he possesses a really complex and fascinating history - both on and off the page - comprising weird potential origins, identity changes, and a cancelled movie cameo that would've sent fans wild if it'd been pulled off...