Announced today, this is the Riddick iOS game Vin Diesel hinted at during the same interview he announced the planned third Riddick game currently in development for consoles. According to the trailer it's going to be available next Friday, September 20th.
The trailer looks really fun. I'm digging the art style for the cutscenes, and the gameplay itself looks to be quite varied. Riddick games have a good track record (with Escape from Butcher's Bay remaining one of the best movie-inspired video games ever, and a great all-around video game period), so I'm excited for this!