Why Undine? Because there is SO much to do there! You'd be a three legged humanoid wandering about replacing people
Most Probable at the Moment:-
- Romulan (Confirmed)
NOT Borg. Why? What would you do?
The answer is fly Borg ships, destroy and assimilate ships and people. Thats it. Thats your entire gameplay. You would not craft (since Borg assimilate, not discover), you wouldn't explore and there would be limited storyline to the missions. Moving around assimilating ships can sound fun at first but after a while, it becomes...bleh. Boring. A Borg faction, in my opinion would just be a massive patrol mission.
Undine on the other hand, have a much more interesting gameplay. You can replace different NPC's from different factions and act out what their performances would be. Infiltration missions are always fun AND you get to fly their epic ships .
Romulans followed by the Dominion. The Dominion have about 18 gamma quadrent species that can make very viable player characters. Compair that to the Undine which has only one. Both the Undine and the Borg should remain as enemy "monster" speices. This is not Starcraft, and the Borg are not playable like the Zerg.