Yeah, some lines might well be incorporated in a fan cut. But here we're talking about an extended cut, and that's not about creating new things in the movies, but adding already existing deleted scenes

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I however would be interested in doing my own cut of the film and so I'd certainly like to perhaps use some lines (as they really sound like Temuerra). However, I only have the german version, so I'll need to get the lines from somewhere. But in Republic Commando, there's also a ton of cool lines that might be used for the clones