I'm a bit sick of the humanoid primitives that could be lifted right out of Earth's past at various levels of development.
That story plays in SG1 with OUR galaxy and the seeding by the G'ould...but hello? No G'ould stole egyptians and seeded the other galaxy.
So IMO Atlantis has ruined pretty much a big chunk of the SG1 mythos that humanoid life all came from Earth.
Bah. Stupid other galaxy. Screw them. Who cares?
Okay, wait. Unless all the other galaxy people are descendants of the Ancients (from Atlantis). Meaning, they came from Earth too.
Nah. Earth no more populated the universe in the last few thousand years than God did.
Basically, Atlantis needs to get with the mythos building. SG1 went to extremes to do the Thor, Ra, etc. thing up and explain everything in nice tidy