Question, I had this idea, while watching enterprise at some point. Now I agree, Enterprise had its craptastic momments, a lot of them. But some interesting things were touched upon, which tie to a number of things, so here's my idea:
Star Trek Continuum (whatever on the spelling)
This show would be centered around time travelling (think the DS9 episode trouble with tribbles here). It would be set a few more generations into the future beyond the TNG timeline. The story would revolve around some sort of federation time cop. This would tie directly into the mumbo jumbo that enterprise puked out. It would also tie into events that occured on Voyager.
As cast, one could have anybody. But out of narrative interest, I'd like to have the story be about a slightly older Wesley Crusher, and the traveller, who are recruited into a 'future' Federation time crew, in order to save the day. This crew can be any combination of aliens and what not, as the series is set in a distant future from TNG/DS9/VOY.
How the show would work. There are several hundred episodes of star trek now if my count is correct. So my idea revolves around creating plots in which are timepolice carry out their mission within previous episodes of Star Trek. Exactly like Trouble With Tribbles DS9 episode. The entire series would not be a review of previous trek, and there would be individual, completely new episodes, but a high proportion of digitally inserted episodes as well. Basically, the heroes of this new show would help to save the heroes of the older shows, without their knowledge.
otherwise, the show would remain pretty much the same trek as always. There'd be a ship of pyjama clad nancy boys, some cool battles.....
Interesting points of reference that could be used for narrative fodder that the show could play with. Investigation into use of time travel, STIV, STFC, Lots of TOS episodes, an entire season of enterprise, a few Voyager episodes, including the finale, and some great tng epis. There are also characters that could be reintroduced in a new light. Q would be interesting to see from a more advanced point of view, revisiting Ben Sisko, now a timeless being would also be interesting. Mostly, I'd really like to see this temporal cold war, how it plays out from an intelligent point of view (not that of enterprise)
so that's it. I think it would work well on a couple of levels. First for old fans, they get to revisit some of their favorite episodes, or movies in the ST univers, while getting a fresh story out of it. If the shows good, new viewers would be encouraged to go check out the older series' if their interest is peaked by an episode of this new series. And I just loved the tribbles episode of DS9. It was so seemless, and looked great, and the story was great.