I guess it'd depend on how good the Romulan faction/ships are. That and, well, who doesn't have a cross-faction toon or two? Can't see anyone not at least taking the Romulans out for a spin once or twice after launch-day fever has subsided (maybe launch week would be more accurate).
If they make an actual playable Romulan faction, I'll roll a Romulan to see and play whatever content be it PvE or PvP. I have no particular loyalty to any in game faction. STO is a game I play to relax, and it doesn't matter whether I'm doing it as a Fed, KDF, or a Romulan character.
Formerly known as Armsman from June 2008 to June 20, 2012
PWE Drone says: "Your STO community as you have known it is ended...Display names are irrelevant...Any further sense of community is irrelevant...Resistance is futile...You will be assimilated..."