Assault 50 mines in Deepwind Gorge.
Simply for giggles; it seemed appropriate. ^^u https://youtu.be/H4BNbHBcnDI?t=28 (or http://www.youtube.com/watch?v=-Vlgpi2wNrE for a musical experience)
WoWInsider has written a solid article about the new battleground (keep in mind that PTR is PTR - things can change), here.
For MMO-Champion's news write-up about Deepwind Gorge, click here. Good info, with video and pictures!