This is a milestone for Atlantis. Instead of ripping off old shows, they're now ripping off current shows. Seems like Joe Flanigan, who came up with the story, couldn't resist a bit of the Terminator pie and came up with his own replicator variety, complete with a final battle between two super strong replicators, who fling eachother around Terminator style. We also get to see Carter for all of 30 seconds in the teaser. They're really spoiling us now!
It's a shame that the episode didn't focus on the character story of Shepard losing his father, and his rivalry with his brother. It doesn't always need to have the tacked on sci-fi element.