
We rarely see a new battleground added to the game, but this is one of those rare occasions.
Deepwind Gorge is a new battleground where you have to dominate your opponents by collecting enough resources by capturing the area resource nodes.
If you want a comparison with another battleground,
Arathi Basin is the first thing to think about.
BasicsThe new Deepwind Gorge is located (by the look of it) in the Valley of the Four Winds and it's a level 90, 15 vs 15 battleground. You'll have access to three capturable resource nodes and two mine carts (one for each faction). First team to reach 1600 resources wins.

Gathering ResourcesThe main source of resources are from the three nodes of the area: the Pandaren Mine, the Center Mine and the Goblin Mine. Capturing and defending those nodes will reward you with a constant flow of resources (gold in this case), much like Arathi Basin nodes.
A new way of gathering resources is by stealing the mine cart from the other faction's base. That cart has to be pulled all the way to your home base (not to the captured nodes) for the gold within it to be captured. Each cart holds 200 resources, but is no easy task to move it across the map.
Both faction carts can be stolen at the same time and both carts are visible on the map. To capture a cart does no require your own cart to be present at your base.
You can not mount up while carrying the cart and if you are killed the enemies have to click the cart to send it back to their base, or your team mates can pick it up again.

ConclusionUnlike Arathi Basin, the new Deepwind Gorge battleground seems too large for only 15 players, but since AB does not have the cart mechanics, I think it's ok to be a bit bigger. Speaking of that cart, I think it will play a big role on this BG strategy, since 200 resources can turn the tables anytime.
In my opinion the cart should be carried back to its base by the the faction that owns it. It would make the fights for that cart really interesting. But I guess sending it back only by clicking on it should be fine too...