The Narada is an intersting puzzle in as far as cannon is concerned. For the movie, and the prequel comics it fits that the ship is a combination of the Romulan mining vessel and Borg enhancements from Borg wreckage from a Romulan-Borg conflict. The modifiactions made at a secret R&D base called the Forge.
As improbable as it may sound, it is possible for most of this to have happened in the prime timeline, (TOS to Nemesis). Think about it, the Romulans dominate the Beta quadrant which borders on the Delta quadrant, so the possiblity of Romulans claiming Borg debris including a few drones. The Romulans, (like the Voyager EMH) would cut open a nanoprobe and reprogramme it to do whatever they wanted. The comics suggested it could fire while cloaked, like the Sctimiar, so it obviously would share the Sctimiar's cloaking device, (which most likely was a Tal Shair prototype).
It is just possble that the Romulans do have a secret R&D bases deep in Romulan territory given their suspiousness and the Sctimiar was not built on Remus, as it would have been too obvious even for the Romulans to miss. theuy would call it the Forge after the forge Surak crossed back on Vulcan as a cover word, and because the Romulans would try to use the vessel to attack and conguer Vulcan.
Instead of a mining vessel though, they would use an old D'deridex class warbird.
Imagine a Borg/ Narada style modfied warbird flanked by tow sctimiar class ships on either side decloaking in orbit of Vulcan.
As improbable as it may sound, it is possible for most of this to have happened in the prime timeline, (TOS to Nemesis). Think about it, the Romulans dominate the Beta quadrant which borders on the Delta quadrant, so the possiblity of Romulans claiming Borg debris including a few drones. The Romulans, (like the Voyager EMH) would cut open a nanoprobe and reprogramme it to do whatever they wanted. The comics suggested it could fire while cloaked, like the Sctimiar, so it obviously would share the Sctimiar's cloaking device, (which most likely was a Tal Shair prototype).
It is just possble that the Romulans do have a secret R&D bases deep in Romulan territory given their suspiousness and the Sctimiar was not built on Remus, as it would have been too obvious even for the Romulans to miss. theuy would call it the Forge after the forge Surak crossed back on Vulcan as a cover word, and because the Romulans would try to use the vessel to attack and conguer Vulcan.
Instead of a mining vessel though, they would use an old D'deridex class warbird.
Imagine a Borg/ Narada style modfied warbird flanked by tow sctimiar class ships on either side decloaking in orbit of Vulcan.