Re: Pure & simple: Do you want Whedon as X4 director?
No. Because Whedon already had his chance at the movie-verse in X1. I know some of you may recall, "Do you know what happens when..." which turned out to be one of the worst lines in all of film history. Yea, that was his brain-child. Can you imagine 2 hrs of dialog like that?
Oh HELLS nah!
The best theory on Red Matter I've yet heard:
The death-knell of a billion red-shirts lost in duty, focusing their agony for a singular plot-point.
-- The Internetz