Oh look a female Turian! Anyway Mass Effect 3: Omega DLC is the story of retaking back the infamous space station with the help of Aria. The DLC is stated to be twice as long as previous DLC’s. The retaking of Omega was always planned to be included in the main game, we can see the start of the quest when we help Aria get control over the different mercenary groups, however the content was cut, not for the sole purpose of getting to sell it to you as a DLC but because Bioware ran out of time and couldn’t do the battle justice so focused their attention on other aspects.
Mass Effect 3: Omega DLC is now out on the Xbox 360, PSN for 1200 Microsoft Points or $15.