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..."