As far as I know, and I feel this is canon... sorta...
First Contact brought quite a bit of time travel right at the very nexus of what would become the "trek" universe, The first warp ship and first alien contact. However, it also brought the Borg to Earth.
Many moons later, Enterprise had an episode connected to First Contact. Connected by the Borg.
I seem to recall even Berman once said that the timeline for trek had been changed because of First Contact.
Really, I didn't need Nero to mess with the timeline, it already happened?
First Contact brought quite a bit of time travel right at the very nexus of what would become the "trek" universe, The first warp ship and first alien contact. However, it also brought the Borg to Earth.
Many moons later, Enterprise had an episode connected to First Contact. Connected by the Borg.
I seem to recall even Berman once said that the timeline for trek had been changed because of First Contact.
Really, I didn't need Nero to mess with the timeline, it already happened?