This idea is so laughably bad there are just no words to describe it. There isn't anything in the world 1 billion people can agree on, and there sure isn't a market for this type of game.
I know they're egger to make that 2 billion they wasted on a company not even worth a fraction of what they paid for, but Rift isn't going to even get to home console level success, there just isn't that must demand for it in the market. Before the buyout there was, it was just a small company that made the product on demand, but Facebook is just insane in all this.
If I had Facebook stock, I'd sell while it was still worth something.