StarCraft II: Heart of the Swarm/New Zerg units

Swarm host
This unit will not need burrow upgrade to burrow and once burrowed it attacks its foes nonstop. It is like a ground version of the Brood lord only it spawns locusts instead of broodlings.

Viper
New spellcaster unit that abduct units, drain the health of a Zerg structure to gain energy and makes a cloud that reduces ranged units attack to 1.

Campaign units
Overseers and Corruptors won't appear in the campaign.

Torrasque
A special strain of the Ultralisk that revives itself from the dead every time it dies.