I wonder what the unused Oliver Stone Mission: Impossible 2 idea was. The unused Joe Carnahan Mission: Impossible 3 idea probably doesn't fit with this franchise.
I recall hearing something about organ traders (the Carnaghan version). Doesn't sound like summer blockbuster material but that's what I remember the talk being at the time.
I can't remember what the Stone MI2 would have been about. I think it may have been the same plot as the Woo movie.