I think this may qualify as a WAG, but I think the Denarians show up on Chicago's side.
We are given information that Nic had suffered terribly reputation-wise. The kinds of people who would hire him were suddenly not hiring him anymore. He also seems to be anti-Nemesis because he doesn't want anything that deprives him of choice. (He and his coin have an arragement). He may have more to lose if the Titan gets her way. It would be interesting for the Knights to be conflicted by having to fight on the same side. I don't know if the Genowska will be coin-less and fighting with the Fomor, or still have the coin and fight with the Denarians (and probably still go after Harry).