Keanu Reeves is set to join the cast of the upcoming third instalment of the adventure-comedy film “Sonic”. Reeves will play the character "Shadow", which was revealed during the Comic-Con entertainment event. The “Sonic” franchise dates back to a video game released in 2001 and has since become a massive success, grossing over $700 million worldwide with its two previous films. The plot of the new film has not yet been revealed, but the previous instalment revolved around the character Dr. Robotnik and his companion Knuckles searching for a source of energy that would enable them to wipe out civilization, with Sonic and his friend Tails working to save the world. The voice cast includes Jim Carrey as Dr. Robotnik, James Marsden, Idris Elba, Ben Schwartz, and Tika Sumpter.