To be fair, the Black Sun characters first came out a set earlier than the OR ones. And since the CotF set, we've had Bounty Hunters which was a predominantly Fringe set so getting more Black Sun was a given, and A&E, which was mostly OT.
A Fringe sub-faction shouldn't have more characters than an actual faction, but we just need to be patient and we'll get some more support for them.
We know for sure that FU will have every character represented, so we'll at least get one OR character.
Personally, I can't wait cause it's so hard to build an OR squad these days.
Carth would be good so that Bastila can have another character to go with in themed games. But I'm also looking forward to a Nomi to battle my Ulic.
I like how WotC did the Black Sun characters. I wouldn't mind seeing Peace Brigaders in that regard to help out the Vong but as a way to still be Fringe so people who don't like the Vong can't really complain about them.