What would Finchers MI3 with ScarJo, Ken Branagh and Carrie Anne Moss have been like?

I'm curious about the Fincher MI3 that didn't happen for whatever reason.. don't think it would've ended up the same script that Abrams version became?

From wiki/trivia

In 2002, director David Fincher was slated to direct the next installment of the Mission: Impossible film series for a summer of 2004 release date. Fincher dropped out in favor of Zodiac (2007), later citing creative differences over the direction of the series. Joe Carnahan was chosen to replace Fincher; Carnahan worked on developing the film for fifteen months. Under his involvement, the film was to feature "Kenneth Branagh playing a guy who's based on Timothy McVeigh," as well as Carrie-Anne Moss and Scarlett Johansson in other roles. Moss would have played a new character named Leah Quint