In an interview with Entertainment Weekly, movie director Christopher Nolan (Memento, The Dark Knight) mentioned that a game based on his film Inception is in the works. "I always imagined Inception to be a world where a lot of other stories could take place," he said. "At the moment, the only direction we're channeling that is by developing a videogame set in the world."
That's it, that's all the details we'll get right now. According to Entertainment Weekly, Nolan is "developing the game with a team of collaborators" (whatever that really means) and that it's a "longer-term proposition" (whatever that really means). Either way, it's nice to see the film's director himself collaborating with who this mystery developer might turn out to be.