Because that's when Spider-Man 4 will be released, "web-slingers!" This article from yesterday's Variety claims director Sam Raimi and stars Tobey Maguire and Kirsten Dunst are on board, with the script being written by Gary Ross.
Ross's previous writing jobs have been a bizarrely mixed bag, including Big, Pleasantville, Mr. Baseball, and the film that gave Kevin Kline his most memorable dual-role, Dave, so it's anyone's guess what this guy is going to come up with for a Spider-Man movie.
I wonder what happened to the talk of a Pulitzer Prize-winning playwright writing the script. I'm just going to assume Raimi switched writers to find someone with more experience in writing the themes he has planned for the fourth film. Meaning his ideas for Spider-Man 4 probably revolve around Spider-Man magically aging, magically entering a '50s television show, playing baseball as Tom Selleck in Japan, and being both the U.S. President and someone who looks so insanely similar that he can pass as the U.S. President. So, basically, it's already way better than Spider-Man 3.