Well not really. You see the game industry is notorious for not being too friendly toward patents or NDAs (if you`re a small party approaching a publisher) To be honest patents for software are a bad idea in my opinion. You can`t really patent an idea for software because somebody can and will do it differently. That being said, however, I`m not too worried about the bigger companies taking my idea for game episodes for two reasons.
Some small, established indie game companies are all ready doing that. And plus the big guys need established hits to stay afloat. They won`t risk thier companies to try to create something that potentially has no market. They usually wait for the small guys to stumble through it and make it profitable. The same thing happend with Cell phone and Casual Games. So by the time they get around to creating Episodic Games with any type of consistency I`ll be way ahead of them. Plus I`ve got a marketing ace up my sleeve that I don`t think anyone is doing.
The thing with the big guys is talk is really cheap. It`s cheaper to have the idea. But their implementation is slow and expensive. I think I can use my indie speed to beat em.