The Men in Black agents protect the world from the threat of hostile alien invasion. The two man team format works out great if only a single rogue alien is on a rampage. However, in 2034, the Zerg have invaded the planet. The hordes need to be stopped and a peace negotiated with them. The MiB are putting together a team of highly motivated go-getters from the ranks of MiB agents, visiting aliens, and resident aliens.
The Zerg, somehow, seem to match the species roughly described in the latest Starcraft game, though only some lower level units have been recovered. MiB has teams going through the development notes at Blizzard HQ. Hopefully some actionable Intel will result from that and from ongoing research into the recovered corpses.