Re: X-MEN: Days Of Future Past (Casting, Rumors, Pics till release)
"First Class" as we got it would not have happened without Bryan Singer's treatment being green lit. Untill that point it was still based on Jeff Parker's "X-Men: First Class" comic. He and Vaughn worked very closely together. They were pretty much in-synch with each other for the entire production of the film. Singer also helped cast the movie IIRC. Vaughn directed the film and put his own stamp on it, but the film was as much Singer's as it was Vaughns. As I've said before, it seems like some fans have forgotten just how much involvement and how important Bryan Singer was to "X-Men: First Class".
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Ignoring the The Last Stand since 2011.