Spider Vase - Toss a vase and a large spider spills out that has a torrent of smaller spiders that spill out as it walks
Gargantuan - Shown at the event but not the B-Roll video. It is a larger version of the Wickerman shown at Blizzcon '09. It is persistent and works with your other summons
Big Bad Voodoo - Creates a shaman ward that buffs you.
Hex - Turns enemies into chickens for a period of time.
Fire Bats - A swarm of bats are ignited in a cone and sent at enemies.
Soul Harvest - Seen before but it is not changed. You gain a buff for all enemies that are close to you. The more enemies, the more portent the buff.
Oh, I believe it leaves a dot as it walks around. The spider can be seen with a torrent of spiders coming out of it. It seems really slow though, so perhaps it just does a lot of damage if it does happen to get into range of an enemy.