Here's his answer -
*Absolutely not. We did not change the fates of any characters at the last second. As you know, there are some deaths in X3. They may have changed over the early span of development (long before we started shooting), but they did not change during production or post-production.
To me that means if Scott's death was filmed during the initial production it wasn't changed during the reshoots.
Here's something else from that same Q&A -
4 So you arent worried about the book by Chris Claremont will give away any spoilers, you say it will be different but wont it give away deaths or things of that nature....I mean it has to be fairly simmiliar I would assume.
*Fairly similar, but still very distinct. Chris is a genius, and he was encouraged to remain loyal to the essence of the film, while following his own instincts with the story. Also, he only had access to the script, not the footage, so he doesnt know what we shifted and changed while shooting.
Okay, Simon just said the fates of the characters were not changed from their original shooting script ---- the one Claremont is working from --- which to me means that the book will spoil who lives and who dies.