I think the aliens want to come save us from ourselves. In related news, they've been mind controlling us to hurt ourselves for about 100 years, so when they got here, we'd DEFINITELY need saving.

I have some... first hand knowledge, and one of the things that has been given to me is Orson Scott Card. I think he's more of a prophet than he thinks, and that this wonderful civilization coming to say Ho is more like the "buggers" than we are.

I see a mind controlling centralized intelligence 'organizing' their interaction, much like the hive queen, except non-biological.