20 Things You Didn't Know About Star Trek: Nemesis
9. The Climax Went Through Many Changes During Production
Nemesis' climax was by far the most iterated upon part of the movie, and went through numerous changes both big and small before shooting began.
For starters, a concerted attempt to keep the budget in check meant that the climactic space battle between the Enterprise and the Scimitar was considerably smaller than initially planned.
Originally the space battle featured a Romulan armada, which teamed with the Enterprise to take the Scimitar on, but this was deemed too expensive and so the Romulan presence was scaled down to just two Warbirds.
Also, late-stage drafts of the script actually had Data sacrifice himself by shooting a warp core located on the Scimitar's bridge, but long-time Trek technical advisor Rick Sternbach felt that this made no sense.
And so, the warp core explosion was swapped out for Data shooting the thalaron generator instead, which was moved to being situated just behind the bridge rather than on it.