X-Men Origins: Wolverine

In the flashback to Africa, a young black girl with white hair can be seen. This is the young Ororo Monroe (Storm), the future X-Men member. This scene was removed from the final cut, but appears as a deleted scene in the DVD.

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. This is because Sabretooth suffers from amnesia just like Wolverine, as explained in the comic book "X2 Prequels: Wolverine", which takes place between X-Men (2000) and X2: X-Men United (2003).

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.

Edited into Deadpool 2 (2018)