Actually I was thinking that because Romulans seem to make a large number of hybrids (Sela, the Romulan/Klingon chick from that one GEN episode, T'pol who was supposed to be a Romulan/Vulcan hybrid if the series had continued) I was thinking that maybe it means you can pick a second race to add on to your Romulan such as Klingon or Human and you could pick some of the race specific traits and customization options to go with your toon.
When they lost their home world, all liberated borg Romulans were on the homeworld. Then the borg queen saw this as a statement of how inferior the race was(letting a supernova 100s of lightyears away destroy their planet) and had all Romulan borgs destroyed. They no longer assimilate Romulans.
I would be shocked if they didn't add the Liberated borg to the Rommies. However, this would mean that fully half of the four available species would be lifetime subscriber-only. (Liberated Borg+ Alien-gen Hybrids) with one of the two remaining ones requiring the Reptation system to unlock. That is completely absurd. First of all, the Remans should definately be available from the start, and having both the Borg and Hybrid specific to lifetime subscribers is riduiculous considering the already low amount of species Rommulan players will have to choose from. At the very least, the Hybrid shoudl be a zen or reputation unlock, and the Reman and Romulan should be available from the start.