Recently Karune posted a fairly large update on what's going on in StarCraft II's development. Included was information on some modifications to various units and buildings within each race's arsenal.
Quote from: Karune (Source)
Throughout the development process, the team is constantly reiterating
and improving on the game in every way. As mentioned before, the
Infestor too is getting a makeover, becoming much creepier and
intimidating – you definitely don’t want to end up helpless at the will
of this thing!
Zerg Infestor Concept Art
http://www.battle.net/images/misc/09-02/InfesterArt.jpg
The StarCraft 2 team has made a number of changes in each of the
races as the game gets closer to Beta. These are some of the new
weapons and abilities that are currently being tested on the
battlefield.
Protoss Dark Pylon
Long used only by the Dark Templar of Shakuras, the Dark Pylon is
now used by all as the Protoss war for survival becomes more desperate.
In addition to providing supply and giving power to nearby Protoss
structures, the Dark Pylon has several unique abilities that require
energy to use.
Proton Charge: an area-of-effect ability that gives all
targeted Probes additional charge for their Proton-Cutters. Probes that
have an additional charge gather additional minerals per trip when
collecting resources. The Proton Charge lasts only a short time before
dissipating.
Null Shield: a single-target ability that causes a Protoss
Shield to shimmer and warp, cloaking the targeted Protoss unit. The
Null Shield lasts only a short time.
Argus Link: a single-target ability that transfers energy from the Dark Pylon to any energy-using Protoss unit.
Screenshot: Proton Charge in Action
http://www.battle.net/images/misc/09-02/PROTOSS_DroneTarget.jpg
http://www.battle.net/images/misc/09-02/PROTOSS_DroneHarvest.jpg
Terran Orbital Command
The Terrans rely not only on the troops they can train on the
battlefield but also on troops called from deep space. The Orbital
Command allows the Terrans to make use of their orbital assets to
support their fight on the ground. As an upgrade to the Command Center
the Orbital Command can create SCVs and serves as a drop location for
collected resources. In addition it has several abilities that require
energy.
Calldown Mule: sends a single automated mining robot by
drop-pod that assists SCVs in collecting resources by working around
current SCV mining operations. Unfortunately the Mule is still in the
prototype phase and has a limited battery supply (timed life).
Calldown Extra Supplies: sends additional supplies to a
targeted Supply Depot. Generally used by Terran commanders only in an
emergency to allow them to support additional troops.
Scanner Sweep: using a satellite in high-orbit, the Terrans
reveal a large area anywhere on the map and detect all cloaked units
within the target area.
Screenshot: Mules Everywhere!
http://www.battle.net/images/misc/09-02/TERRAN_Mules.jpg
http://www.battle.net/images/misc/09-02/TERRAN_MuleVariations.jpg
Zerg Queen
The Zerg Queen has continued to evolve over the last few months.
She is a fierce defender of the Zerg Hatcheries and can often be found
in small groups defending the larger Zerg infestations. In addition to
defending her Hatchery from ground and air threats, the Queen has
several special abilities that require energy to use.
Build Creep Tumor: with a mighty push from her bowels, the
Queen creates a cluster of organic tumors that generate additional
creep. In recent months the Zerg have mutated to move more quickly on
creep, making this an important function for the Queen.
Spawn Larva: by injecting Queen ichor into a Hatchery, Lair or
Hive the Queen can cause the Zerg structure to undergo a startling
metamorphosis. The Hatchery starts to throb and green sacks swell up on
the structure. Eventually four additional larva burst out of the
Hatchery and land next to whatever larva are already wriggling around
nearby. While a Hatchery hosts more than 3 larva, the Hatchery will not
spawn additional larva, until that number drops below 3.
Razor Plague: with a great breath the queen exhales a cloud of
tiny Zerg creatures that create a vast swarm nearby. These creatures
attack all enemy creatures within their swarm, doing additional damage
to biological targets. What makes it worse is the Zerg player can
control the swarm, moving it around to attack whatever enemies he
wishes until the swarm becomes exhausted and dissipates.
Screenshot: Incoming Swarm!
http://www.battle.net/images/misc/09-02/ZERG_TumorLarvae.jpg
http://www.battle.net/images/misc/09-02/ZERG_MutaHatch.jpg
http://www.battle.net/images/misc/09-02/ZERG_Attack.jpg
