That was my first thought, as well.
The virus turns the dominant species on a planet into a bunch of selfless people-pleasers. Also, the infected become pacifists who can't willingly take a life, even to save themselves. Also, they might literally die if someone giving them orders is displeased with them. Each of those features by itself sounds like a control mechanism designed to take over a planet. And the virus is engineered to have all three.
I'm half expecting a second countdown clock to pop up after Carol and the guy from Paraguay look back at the source of the signal and discover an incoming alien ship.
Alien invasion or not, I'm also wondering how long it will be before the hive mind decides it's time to propagate further by turning the entire Earth into a giant transmitter. Presumably, that's the hive mind's biological imperative, even if it means retiring the human species in oder to carry it out.