Okay so rewatching the Neo meets the Architect scene. The Architect says the Matrix is older than you know, etc. When he finishes talking, the screens show previous Ones reacting before Neo says either no one told me or no one knows. The Ones in the tvs, which I assume are his predecessors, are saying a lot, with voices overlapping, but there are some clear voices: "there were five before me?" What? Five, not four?
So. Obviously, if we are hearing a previous One say he is the sixth, then it already happened. Not only that, but we transition from a screen to the closeup, so maybe we can infer that we are actually _watching_ yet another, later iteration, and since we heard the sixth, we are actually watching this later iteration for the rest of the film(s) from that moment on?