In a flashback, Henry is confronted by Mary Margaret and he shuts his lunch box. When he shuts it, you can notice it is a Tron Legacy (2010) box. Edward Kitsis and Adam Horowitz (the creators) wrote Tron Uprising. In another episode, Henry is seen playing Space Paranoids. This game was mentioned in Tron (1982) and Legacy as being invented by Kevin Flynn (one of the main characters).