SPIDER-MAN opens. Directed by Sam Raimi. Written by David Koepp. Based on characters created by Stan Lee and Steve Ditko. Opening salvo in Tobey Maguire-led trilogy ushers in the age of Marvel with a blockbuster $100 mil. weekend. Colorful, geeky, effects-heavy "origin story" confection ladles out its requisite comic book thrills with numbing precision. With Kirsten Dunst, Willem Dafoe, James Franco, Cliff Robetson and Rosemary Harris.