While none of the current races are going to have the ability to become Warlocks, both the new classes, Goblins and Worgen, will be able to train in the dark arts. Let's take a look at their abilities and see how they will benefit, or hinder, Warlocks.
Worgen, being Azeroth's equivalent to warewolves already have a bit of evil within them so it makes sense that Worgen can become Warlocks. I expect to see a lot of wolves running around with Felhounds, simply because that will look cool. I think people wanting to roll Worgen and haven't played a Warlock yet will be likely to give it a try. The original, pre-Arugal's curse Worgen were said to be powerful mages practicing dark magic. That sounds pretty Warlock-like to me. It makes sense that those infected later would still have the desire and skills to master the fel magic.
Two Forms - instant, 1.5 sec cooldown, Turn into your currently inactive form.
As Warlocks we already know what it's like to have evil lurking within ourselves. But mainly, this is just plain cool, particularly when you think about running around as a wolf with a demon at your side.
Darkflight - instant, 3 min cooldown, activates your true form increasing movement speed by 70% for 10 sec.
Warlocks can always use a new way to get away from things. Since I also occasionally play a rogue, I've often thought it would be great if I could sprint on my Warlock to get away from nasty mobs while my minion sacrifices itself for me. This makes the Warlock's already incredible survivability even better!
Viciousness - passive, increases all damage done by 1%.
People complain about the Goblin racials being OP, but seriously? THIS is OP, and of course, awesome. Warlocks are DPS, and this means more DPS plain and simple.
Flayer - passive, skinning skill increased by 15 and allows you to skin faster.
YES! Just what every Warlock always wanted! For all the leather items we wear!
Aberration - Reduced duration against curses and Diseases.
This will be an additional challange for Warlocks playing against Worgen in PvP, since curses are essential to our class.
It was obvious to me that Goblins would be able to be Warlocks, primarily due to our friend Gorzeeki Wildeyes of the Dreadsteed quest chain. Also, why not? There's no lore stating that Goblins can't use magic (which, if true, would be extremely limiting on class choices). Since they can use magic, there's nothing stopping them from becoming Warlocks. They aren't a particularly religious race and are the sort of folk who would do whatever necessary to get
Best Deals Anywhere - always receive the best possible gold discount, regardless of faction.
Less gold for stuff? I'm officially jealous of every Goblin in the game. Every single one of them. Maybe I wouldn't still be scrimping for my epic flying mount if I had this racial.
Better Living Through Chemistry - Alchemy skill increased by 15.
More jealousy! Alchemy is an excellent profession for Warlocks, something I know to be true given how much happier I was when I switched to it from tailoring. It's always great to have potions around and it's just so much easier when you can make them yourself.
Pack Hobgoblin - Instant, 30 minute cooldown, Calls in your personal servant, allowing you bank access for 1 min.
Question: Can you actually see the servant? Because that would be really cool. I think Warlocks should be able to do this with our imps! That aside, it's still an amazing talent for any class. No more having to run to the bank before going into a raid! And if you're an alchemist, you can pick up all the awesome potions you've made with your +15 alchemy skill. Sweet!
Rocket Barrage - 30 yd range, Instant, 2 min cooldown, Launches your belt rockets at an enemy, dealing 30 fire damage.
Awesome! This just sounds really cool, and it's fire damage so it's not like this goes against something Warlocks are doing already. I wonder, though, if you can see the belt on your Goblin at all times.
Rocket Jump - instant, 2 min cooldown, activates your rocket belt to jump forward.
Escape mechanisms always come in handy for Warlocks, and sorry Worgen, this is so much cooler than just plain running. Can you imagine having a Goblin Rogue? You could be jumping and sprinting all all over the place!
Time is Money - cash in on a 1% increase to attack and casting speed.
Okay, so perhaps Goblins are a bit OP, with their 1% haste increase! Cast your DoTs faster!
Many classes are now available for previously existing races. No previously existing races that have not been Warlocks in the past are going to be available for Warlocks now. I could see Trolls as Warlocks, or perhaps Draenei. After Cataclysm, Warlock will be a rather exclusive class in the game, after Druids, Paladins, and Shaman. [See the chart.] Why is this? I think Blizzard realizes that not every race has the stomach to allow Warlocks. Mages might be happy that their class is available nearly accross the board, but we Warlocks know the truth, that just about anyone can be a Mage, but it takes someone special to play a Warlock.