I actually played the ancient hypergate warzone at Gamescon this year.
The objectives:
As far as i understood it playing, you have 2 open areas left and right, and 1 kinda housed large area in the mid, where teams spawn at top and bottom after death and at start.
After 1 team caps both left and right objective (lets call them turrets, u cap them by clicking and channeling, like ACW turrets), after some seconds both left and right area are "burned", as in everything is killed outside the central "housed" area. And then its rinse/repeat, collecting some "points" that i didn't quite understand.
If u played the Khaine's Embrace scenario from Warhammer Online, its basically the same thing, with different spawn point.
Seemed pretty finished then, dunno whats the holdup