So is Sabretooth (the guy who looked like a lion in the first Xmen film) really Wolverine's brother like it says in Xmen Origins: Wolverine, or did they just make that story up for the sake of the film?
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Yeah, it was made up for the film, so was his entire skeleton being adamantium, it's just his claws. They did get the whole plot point point about them being civil war vets right though.