I would hope not, and I honestly don't believe that he would do such a thing which is why I don't really believe what I've seen said about AL. But if, and I stress that's a big IF, such a thing were true, it could just be that they don't want to spend the next 4 years working on this one game and if they can get it done sooner without compromising their vision and their story, then they'll do that.
With this episode being so big, as they've said, it could be that it's covering some ground they expected to cover later and as a result they might not need as many episodes anymore. If that's the case, then it would be a natural acceleration of the story based on the events of this episode lining up with ideas he had for later but has been able to implement here, as opposed to a forced acceleration which would bring elements forward just to speed things up, but I don't believe they would do that.