There's no restoring to be done. The attack on the U.S.S. Kelvin created a new timeline that exists alongside the original.
In practical terms - for TV and movies - the new timeline exists from here on out; the original timeline exists from 1964 to 2005.
You can't know that, not unless you are J.J.Abrams. LOL! The "new timeline", which is technically an alternate
timeline, can be destroyed as easily as it was created.