It's a two-parter...So "the Rise of the Googlions" part 1 and part 2.
Alan McCullough writes part 2 ( don't know who this guy is )
" A number of pieces fall into place as many things we've been building toward come to fruition."
source J.M's blog
First of all I love the title: "the Rise of the Googlions"!
In my opinion it won't involve the wraith, because there are already to many episodes with them.
Maybe it has something to do with Carson: "the rising of"... Maybe he ascended, for me the last scene in "sunday" points to it, and he somehow convinced the ascended ancients to help Atlantis.
"A number of pieces come to fruition"; the first goal of the Atlantis expedition was to learn from the ancients, maybe this will be the case.