I think I read some where recently that they are looking to do something with the Romulans for number 11. But all is hearsay until it's released.
Worst final episode ever? Enterprise.
Best Season Cliff Hanger? It's a tie...Best of Both Worldspart I or Voyager's first scorpian episode.
Best Star Trek Space Battle? Had to be DS9 when Sisko retook the station from the dominion. A-W-E-S-O-M-E!
I do agree that DS9 was the most enticing, the best part of the whole thing was fast forwarding through all of the Ki Wynn portions. It got a little heavy on religion at the end but still damn good.
There wasn't a lot of depth to them, but I did enjoy the Andorian's in Enterprise.