I have a feeling it's going to be a lot like the episode itself: you encounter a lost Iconian outpost and probe. Your ship gets infected. You beam down and get stuck in an Iconian portal of some sort. Work your way out of that and save your ship.
Iconians behind the Undine Invasion, the destruction of Romulus (was it ever revealed who were the higher powers that Praetor Taris was working with/for?), and other significant happenings in the timeline towards a restoration as their civilization as the dominant race would be awesome.
Maybe the Rom's and the Iconians will ally themselves with each other
Highly unlikely considering the Iconians are the primary antagonists in STO and the Romulans are intended to be the next playable faction. Plus, considering their attitude in that one mission you encounter them, they likely consider every species below them, Romulans included.