Diablo Salvation
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From Diablo Wiki
Diablo II: Salvation was a title Blizzard registered in 2002, as a title for a movie or video game. It was never used and the trademark is now classified as dead by the US government.
Blizzard has never offered an official statement on their intended purpose for this title, but it seems to refer to some sort of never-created Diablo 2 movie.