Spider-Man 4 &5 to get underway with Sam and Tobey signed?!?

Keeping McGuire and Dunst for 4 & 5 means they can package all 5 movies together several times over for various boxed sets.

Change the actors and you basicly have to reboot the story. Nothing wrong with that, but there'd be no point in ever buying a boxed set.

 

^That did not stop Warner Brothers re-releasing anything they could get their hands on with "Batman" in the title when The Dark Knight came out.

Fox got in on the act too and re-released the Adam West movie.