Re: References to other Trek MASSIVE SPOILERS!!
And the early 22nd century Ring Ship, too. That ties this film to both ST:TMP as well as the episode "First Flight(ENT)," further reinforcing the canonical status of the Earth-built ring ships even if we've never seen one in flight or action in any film or episode.
"On Halloween night the Great Temporal Pumpkin rises out of the Chroniton patch and flies through space to bring new timelines to all the good little children of the galaxy." -cooleddie74