Re: A Spider-Woman film?
Given the low success rate of superheroine movies (Supergirl, Catwoman, Elektra, all flops) and action movies with female stars (only Mila Jovovich and Angelina Jolie can launch an action movie), and the cost of comicbook movies, it's hard to see Spider-Woman being a risk worth taking. Especially if it dilutes the Spider-Man franchise.
There is no Marvel/DC rivalry. Most of the great comic creators worked for both; Jack Kirby, Frank Miller, Grant Morrison, Walt Simonsen, Gil Kane, Steve Ditko, John Byrne, Steve Englehart, Mark Waid...even Stan Lee.