Superman II

In a 2004 interview, Margot Kidder claimed that Richard Donner shot enough scenes to make his own cut of the film, and that the unused footage was "somewhere in a vault." A website started a petition for Warner Bros. to allow and sponsor Donner's cut of this movie. The footage was re-edited into Superman II: The Richard Donner Cut (2006).

Superman and Lois fly to the Fortress of Solitude (which is at the North Pole). After Superman gives up his powers, they have no way to return to civilization. Somehow, they got to a diner safely which doesn't appear to be close by. It's even shown that Lex Luthor, who's human, used a snowmobile to get to the Fortress of Solitude and back.

Superman could have made arrangements to return safely back to civilization prior to surrendering his powers.

Opening credits incorporate an extensive amount of footage from the first Superman movie.

In late 2006 a new version, Superman II: The Richard Donner Cut (2006), subtitled "The Richard Donner Cut," was released on DVD and Blu-ray by the new rights-holders of the franchise. It reinserts virtually everything that could been salvaged from what Donner shot for his intended original version of the film, such as the infamous Marlon Brando scenes, before the producers sacked him. This version uses less than 20% of material filmed by Richard Lester, and since that left a few gaps in the story with no possibility of re-shoots, Donner had to make do with just about every bit of footage he had shot some 25 years before, including some which had only been shot as screen tests.

Edited from Superman (1978)