X-Men Origins: Wolverine

Liev Schreiber was given a muscle suit to wear for his role as Victor Creed, similar to what Vinnie Jones (Juggernaut) wore in X-Men: The Last Stand (2006), to make his physique look comparable to Hugh Jackman's two hundred twenty pound figure. The suit made Schreiber feel "humiliated", and he requested a chance to gain real muscle. He trained for three months while filming Defiance (2008) in Lithuania, and continued to train alongside Jackman during filming. Jackman also made Schreiber add a great deal of protein to his diet, which Schreiber called "the genocide of chickens." In the end, Schreiber gained forty pounds, and had to buy several new suits due to his back gaining several inches in width: "I can't fit into my favorite suit now. But I felt like I owed it to the genre to be big."

Sabretooth and Wolverine are supposed to be brothers, but in the first X-Men (2000) movie they encounter each other several times and there is no mention of this connection. Even if Wolverine has amnesia, there's no reason Sabretooth wouldn't recognize him or speak to him as a brother.

SPOILER: There are two scenes set after the closing credits. The film's main post-credits scene is of the Deadpool, still alive after being decapitated. He reaches for his head and whispers briefly, ending the scene. This scene does not lead into Deadpool (2016) as that film is set in the new X-Men timeline, whereas this film is set in the old X-Men timeline. An alternate post-credits scene seen (only on the DVD) is of Wolverine in a Japanese bar, leading into The Wolverine (2013). During the original theatrical run, which scene you saw was random depending on your theater; the home video version features the Deadpool scene after the credits and the Japanese bar scene is available on the two-disc DVD as a deleted scene.

German theatrical version was cut by the distributor before submission to the FSK to secure a "Not under 16" rating (the killing of the old couple is shortened, you don't see Wolverine igniting the gasoline). Ironically, the uncut version, submitted for the home video release, was rated "Not under 16" as well, thus rendering the cut theatrical version completely unnecessary.