Ya really want that continued too, but I don't think we will get more for a while. They said it was to be end game content for them and right now their focus is on begining and middle. I think we are looking at 6 months min before we more.
Will the Iconians be back ? - Yes
Cryptic wont let a dead horse lie any more than Voyager left the Borg
I fully expect the Iconians will gradually make their way into the game more and more but its likely to be limited to Featured Episodes.
So far it has become extremely obvious Cryptic dont have a clue what they are doing with an Iconian faction. Either because they dont have a clue what its meant to be like or because CBS are pulling the strings on playing with this race.
Are we going to see them again? Is there really a master story plan or were the Devs just winging it?
(begin Cryptic doom comments)
I think it is a long term plan to develop that story... We saw them even before the Featured series both early game and VA missions, so I think theres more coming, but it is somthing that they will push far ahead in favor of c-store items and keeping people engaged, waiting for that next Iconian appearence.
I think the point is that they want war, because all the species together are in fact too strong for the iconians to take on, so they are using species 8472 to weaken us and will make their push when we are all at a point where they think they can take us on.