First, a word of warning. The information in this post is accurate in beta build 15961 and may change significantly before launch.
Like Silvershard Mines, this battleground is only currently available at level 90. It is significantly more straightforward in construction than its mine-based sister battleground but equally as tactically interesting. I'm really excited about both these battlegrounds, and I think it's fantastic how Blizzard is introducing new styles of battleground rather than capture the flag, capture the node, and invade the keep.
The in-game battleground finder screen describes the battleground as follows:
Let's take a closer look.The Horde and Alliance wage battle for the ancient Mogu artifact that is foretold to hold great powers.
Temple of Kotmogu is a 10 vs 10 Powerball battleground where each side attempts to control the Mogu artifact for as long as possible in different scoring zones