Yes, I have....
They are having trouble thinking of decent game mechanics, and ways to keep the game balanced and entertaining, without giving people too much power over other players. But it's just a romor, with the popularity of the Matrix, I'm sure it will emerge at some point.
Something else you should know, these MMO games tend to get delayed many many times, because of the reasons I said above... along with the fact that they take a huge amount of testing so they can make sure the game is runnable and the server they have going is decent and without bugs.