Super Dweeb and the time trumpet

"Super-doodler Andy may have an awesome atomic pencil that brings his drawings to life, but he's still pretty new to the whole hero thing. Sure, he can handle small-time crooks ... but he's definitely not ready for jailbreaks, supervillain team-ups, and time travel! Unfortunately for Andy, a terrible trio of criminals have leapt back in time from his future to stop him before he's ready. They're going to keep him from becoming the awesome future...