just a quick off note:
Perhaps the ori where the ones who created and left the nanobot virus on atlantis which was uncovered during "Stargate Atlantis - 01x13 - Hot Zone" episode, that might be tied into a possible future episode.
The creators of the virus have not yet been studied, therefore could this be the link to the ori/ancient indifference of good and bad,light or dark.
I say this partly because of the ori's "worship or die" senario by spreading illness to the non believers, perhaps, like the wraith the ori too where a neglected segment of beings left to evolve from the mistakes of ancient dna manipulation.
just a thought.