Ok, I've had a few ideas for books but they never really went through.
1. Kids get sucked into Assassins Creed and then are hunted down by Ezio while they Greg to escape the game
2. Super villain with tech powers decides to merge reality with video games. Some kids get the powers of some of the main characters from the video games and have to stop him/her. Ex: Some kid gets the 1. Stealth and Skill of Ezio 2. The Ability to fly, heat vision, ect. Man of Steel 3. Light saber, skill of Luke Skywalker.
3. A kid with a weird haircut *cough* *cough* you *cough* gets crazy superpowers and has to stop a huge extinction event coming to earth.