To be fair, getting a movie deal takes time and there's a bunch of hoops you have to jump through even if people are interested. Look at the movies that people have been talking about happening for years, but never going past the drawing board like Akira, Cowboy Bebop or Ghostbusters 3 which turned into the mess that was Ghostbusters 2016. They couldn't even get Sony's movie branch to take on the project and they were one of Sony's prized mascots. I wouldn't be surprised if it took until 2012/2013 to get something going. Plus Ratchet and Clank games were still being made at a decent rate at the time to keep their presence somewhat aware in the gaming community so it was probably still worth a shot based on that.