Well they screwed up in Nemisis. I mean, why go through the whole trouble of the introduction of B-4 to basically replace Data, that is when they shoud have gotten a different actor to play him. Instead, Brent again played B-4. Talk about shooting themselves in the foot! They had the perfect op to replace him.
exactly that's were they should have done it. beside the all thing of doing all android at his image was dumb to they didn't think actor will grow old or anticipated that we will love Data