I believe it was Orci who made reference to Terminator 2. The movie plays out in a way that you're not supposed to know that Arnold is the bad guy, but everybody knew that anyways. He'd imagined that the movie would have been so much better if that particular point hadn't been spoiled.
Hell, the T2 trailers pretty much spoiled that right out of the gate. Trailers these days give away too much plot detail.