Pasi Nurminen wrote:
It would have worked better if the villain wasn't ultimately so cartoonish. Instead of blowing up Earth, if his objective had been more subtle, more nuanced.
The problem wasn't so much Shinzon was threatening Earth as it was his plans for Earth just get revealed just before the final battle, and even then, it's out of the blue with no motivation behind it. "I spent my whole life abused and tortured by Romulans, but I'm going to take my anger out on Earth."
One kind of gets the impression Paramount listened to the criticisms about Insurrection failing because Earth wasn't in danger, and felt a threat to Earth had to be shoe-horned into Nemesis.