My curiosity would probably warrant me playing a demo, although gornography is definitely not my thing, I doubt it'll be a great game either. Franchises being milked for all they're worth never tend to spawn high quality games.
I don't think the Saw franchise is a good setup for a game. I love the movies, but this sounds like a forgettable failure. Worse concepts have been used, though. Golf games exist.
The game? Is it going to be a point and click adventure xD Odds are going that it isn't going to be a great game. Film->Game Film->Book Book>Film Game>Film Book>Game They all usually suck except for Spiderman 2-best videogame of a movie ever.