So I'm starting to see some new possible additions to my stack in the upcoming Commander product.
Angel of the Dire Hour

Creature- Angel
Flash
Flying
When Angel of the Dire Hour enters the battlefield, if you cast it from your hand, exile all attacking creatures.
5/4
Great combat trick and big flyers with flash are always worth at least taking a look at, I think.
Malicious Affliction

Instant
Morbid — When you cast Malicious Affliction, if a creature died this turn, you may copy Malicious Affliction and may choose a new target for the copy.
Destroy target nonblack creature.
Solid removal with the potential for card advantage.
Necromantic Selection

Sorcery
Destroy all creatures, then return a creature card put into a graveyard this way to the battlefield under your control. It's a black Zombie in addition to its other colors and types. Exile Necromantic Selection.
Hell of a boardwipe! I like that the creature you get back doesn't have to be one of yours so you can use it as a Control Magic as well if you don't care about pissing off the whole table.
Overseer of the Damned

Creature - Demon
Flying
When Overseer of the Damned enters the battlefield, you may destroy target creature.
Whenever a nontoken creature an opponent controls dies, put a 2/2 black Zombie creature token onto the battlefield tapped.
5/5
Another good etb creature with a bonus ability to boot! I only recent cut Dark Hatchling out of my stack and I'm guessing if there is still anyone left playing him, that ends now.
Dualcaster Mage

Creature- Human Wizard
Flash
When Dualcaster Mage enters the battlefield, copy target instant or sorcery spell. You may choose new targets for the copy.
2/2
Holy pushed cards, Batman! I really want to add this guy, as Fork may not be playable on it's own, but putting it on a creature opens up so many possibilities.