And we do mean that you have to have done everything else; the quest is open to only those who have already cleared the Savage mode of Omega. Successfully clearing the fight will reward you with a token for a high-end weapon, but the obvious intent is that not many people will be able to clear this, making it less a major step in progression and more a diversion and an amusing footnote. If you’re not up for the challenge, there are still some bugfixes in the patch, so it’s still an improvement to your overall quality of life; that’s something.
Source: Official Site