The next instalment in the Starcraft II trilogy is still without an official release date but Blizzard has finally released a trailer with enough content to whet the appetite of any Starcraft fan. In two minute trailer comprised of mostly in-game footage you will see every new unit, with at least one new unit per class (Zerg, Protoss and Terran).
Also shown is some of the intense challenges that await in the campaign such as your entire base become a frosty, useless mess. I am most excited to see how the new flying Zerg creature works as it appears to be able to enemies toward it from quite a distance, meaning your zergling rush never needs to enter the frey. See the video for it in action as well as some story details.