Litwak: Ralph never really explains who Litwak is. The introduction of Litwak expects people to know he is the owner of the arcade aka Litwak's Arcade. I wouldn't mind seeing a couple of scenes of Litwak's lifestyle. Not a whole lot that'll completely ruin Wreck-it Ralph 2. But it will be nice to explore the outside of Litwak's Arcade just a little bit.
Turbo: Remember Sonic the Hedgehog in the start of the film when Ralph is walking out of Pac Man? Sonic: If you die outside of your own game, you won't regenerate. Ever! Game over. Turbo coded himself with Sugar Rush despite Vanellope screwing up Turbo's code during the race. He is known to cheat and likes to mess with character's programs. Hince, the scene with Turbo using a old NES controller for a password to get into the programing vault. I think Sonic spoiled Wreck-it Ralph 2 Plot and Synopsis...