It's a shame that Saavik wasn't used (instead of Valeris) in The Undiscovered Country - would've made films 2, 3 and 6 into a cool trilogy.
Another bit of info:-
The DS9 writers originally drafted the end of DS9 with the Federation LOSING the war with The Dominion (though TPTB nixed it) - I know it would be very UnTrek of them to have an ending like that - but it would have opened up interesting possibilites for a new series (instead of ENT) and even an intriguing ending for VOY...