Activision Inc. and Marvel Enterprises Inc. agreed to extend their superhero video game licensing agreements. Financial details weren't disclosed, but the companies said the new agreement represents the largest deal between the parties and includes improved financial terms. In a press release Wednesday, Activision said it will develop and publish video game products based on Marvel's comic book franchises Spider-Man, X-Men, Fantastic Four and Iron Man through 2009. Under the new agreement, Activision also has the option to acquire the interactive entertainment rights to develop products in conjunction with motion pictures and television series involving those characters.