, I believe the show runners at DS9 actually planned to bring Eris back, and tried to do so several times. She was supposed to have been the Vorta in "The Search" Parts I and II, but the actress was unavailable, so they went with a male Vorta, Borath (no, not Borat
). They next tried to bring her back for the season 5 episode "The Ship," but once again, the actress couldn't do it, so the role of Kilana (otherwise known as "The Vorta with a nice rack") was created.
I do believe she pops up in some treklit, though.