I love the character of Obisek... will we ever see him again?
I sure hope so. And, based on the fact that the character was both very successful and very popular, I'm betting we will! Obisek is fantastic, and the way the story arc has been written I have a feeling that Cryptic knows just what they have with him.
He and Admiral T'nae will probably be the contacts for the Iconian arc, just as they were for this series.
But that's a long time off; the devs have mentioned that the Iconians will be the major threat to Fleet Admiral rank (level 61) players, and they've also said that they're probably not going to raise the level cap until sometime in season 5 or 6. Considering that we probably won't see season 4 until the end of May or June, then season 5 will hit sometime around October and season 6 will be around January or February 2012.
So we might be fighting the Iconians around Christmas, maybe.