The fans wanted it and The Coalition will make it happen. King of the Hill returns to Gears of War in an update scheduled to go live on November 20th.
According to a post on the official Gears of War forums, the game developers have paid close attention to player feedback and will be bringing some desired features to Hill mode.
In addition to King of the Hill, the developers have increased the odds for fan favorite maps to appear in the rotation system. There will also be a special Execution event this weekend called Brothers to the end.