well, if odo were successful, i would assume that there really isn't a dominion in the gamma quadrant. since the founders relocated their homeworld, and no one really knows where it is, it's possible that the dominion was desolved. allowing the worlds of the dominion to regain their sovereignty.
However, I believe that there are splinter groups, vestiges of a time gone by where the Dominion in the Gamma Quadrant, genetically built to be warriors, aren't willing to lie down. I think this subject was also broached in Robotech, right after the episode "Force of Arms".