Keanu Reeves voices Shadow, the vengeful and moody doppelganger of the title speedster in "Sonic the Hedgehog 3," based on the video-game franchise.

Academy-Award nominated director and animator Fowler is on a whirlwind tour with the third Sonic, which is released on Dec. 20. During a London stopover, he sat down with Deadline to talk about the new movie, its starry cast, what might come next in the world of Sonic… and his special relationship with Shadow.

The next installment in Paramount's Sonic the Hedgehog series has plenty for both longtime fans and younger ones to enjoy.