Starcraft 2 - Heart of the Swarm trailer released

Apparently Blizzcon is on at the moment and Blizzard have finally released a new trailer for the second chapter of Starcraft 2: Heart of the Swarm.

From what I can gather, it doesn't look like it's happily-ever-after for Jim Raynor and Kerrigan. Kerrigan seems to be raising hell in order to get revenge on the man who turned her into Zerg, i.e. Arcturus Mengsk.