1. Having the focus on Gwen as the female lead would give a better, more proper time to develop her character (which "Spider-Man 3" failed to deliver upon). In "SM3", she was relegated to being purely the "other woman" in Peter Parker's life.
2. How much longer or where else can the filmmakers go with the Peter-Mary Jane relationship (other than them getting married obviously)? Especially after all of the drama displayed in the last two movies (i.e. Mary Jane almost marrying another guy, Harry forcing Mary Jane to break up with Peter, and the stuff with the symbiote).
3. It would be a deterrent (for the kids who would want to see the movie) for Kirsten Dunst going to rehab. Besides, Bryce Dallas Howard is far more beautiful than Kirsten Dunst anyway.
2. How much longer or where else can the filmmakers go with the Peter-Mary Jane relationship (other than them getting married obviously)? Especially after all of the drama displayed in the last two movies (i.e. Mary Jane almost marrying another guy, Harry forcing Mary Jane to break up with Peter, and the stuff with the symbiote).
3. It would be a deterrent (for the kids who would want to see the movie) for Kirsten Dunst going to rehab. Besides, Bryce Dallas Howard is far more beautiful than Kirsten Dunst anyway.