The Protoss are a force to be reckoned with
Pardo moved on to talk a bit about how the Protoss are progressing in the development of the game. Their psionics are the key theme to their race and Blizzard pushed that further, but also pulled back on the emphasis on spellcasting.
First he showed an example of their new force field ability used to control the battlefield. A video showed a swarm of zerglings rushing a Protoss base, but the Protoss force threw up a series of connected force fields that formed a funnel forcing the zergs into a choke point where they were easily destroyed.
While high damage Protoss spells like Psi Storm are returning, Blizzard also wanted to introduce some early game casters. Nullifiers were mentioned. And Stalkers were given a teleport ability that had interesting strategic potential. In another video of game play, force fields were raised forcing an attacking army to go around it. The Stalkers then teleported themselves to the other side of the force fields, behind the attacking army, and took them out from behind.
The return of the Mothership
The Protoss Mothership also makes an appearance. While not as powerful as the Zerg Queen, it has been given powerful support abilities. It is now a mobile battlefield teleporter, able to zap in troops to wherever it is at. It is also heavily armored and has an emergency ability called Time Bomb which renders it immune from damage for a short period of time. Since it isn't as versatile as the Zerg Queen, Protoss players will be able to have more than one Mothership in play at once.