Players will also be encountering a new species and dealing with the fallout of the Iconian War while also re-exploring largely ignored portions of the Alpha Quadrant. That’s in addition to the new Admirality system allowing players to send out owned ships for exploration and rewards. So where do you go after defeating the greatest threat the galaxy has ever faced? Right back into the final frontier.
Star Trek Online at the end of the Iconian War storyline. What opponent could pose a threat to a galaxy that defeated the Iconians? Well, perhaps an entire other universe with a sinister bent. Yes, the Mirror Universe is coming back in Season 11, complete with Chase Masterson reprising her role as Mirror Leeta and a reworking of the Cardassian story arc at the lower levels.
Source: Official Site