I could see a crossover working, but I could tell you the basic plot outline as well.
They find out that they are the cause of the background radiation, they were the original creators and progenitors of the Ancient and Ori races (already foreshadowed in the last couple of eps). The Destiny has a chair device so at some point it can hook into the Atlantis chair (which, as they know what is to come, based thier designs off) so you have the SGA tie in, SG-1 tie in's are already allowed via the stones anyway.
It's an eternity loop and it's not new, it's not groundbreaking Scifi stuff. Even Red Dwarf has this concept in the episode "Ouroberous" for crying out loud. (and is further developed in the actual books). Geez, if I'm right, no wonder they wanted to nab a younger audience, preferably one that had not read or seen this kind of thing before.
Everything old is new again at some point I guess.