Sony isn't letting a possible writer's strike stop their plans for Spider-Man 4. According to Entertainment Weekly, James Vanderbilt (Zodiac, Darkness Falls) has been hired to write the script for the next film starring the friendly neighborhood wall-crawler.
Vanderbilt will be prevented from working on the script during the strike, but that doesn't mean he would be unable to think about the script during that time.
It is currently unknown what involvement Sam Raimi, who directed the first three Spider-Man films, will have with Spider-Man 4. Similarly, it is unclear whether Toby Maguire or Kirsten Dunst would be willing to return for the sequel.
Sony plans to release Spider-Man 4 in 2009.