Alright, here's my go at a territory event. Sizes of teams could range from 5-10 players (maybe set limit at 5 for now). One team leader is elected.
Every player starts out with a main "base". There are resources around the area that you can collect and bring into your base. Once a certain amount of resources are collected, the leader can choose purchase an upgrade and upgrade the base (much in the way you upgrade houses) and other territories.
In order to claim new territory, it is a King of the Hill event. First one to go to a territory and plant a flag claims the territory as their own. They must then defend said territory for 5 min. and then upgrades into a bunker automatically.
There are 5 levels of buildings:
1. Flag- Simple structure used to represent a team presence for the territory. If destroyed, another must be put in it's place and start all over again, which time an opposing team may plant their own flag.
2. Bunker- Bunker just like all the other bunkers you see in the game. Small defense, but stronger than a flag. Bunker must be destroyed in order to plant an opposing flag.
3. Encampment- Requires 2 adjacent territory and Bunker to remain (may be replaced with resources). 4 Bunkers are scattered over the territory (Leader may decide where to build bunkers). A teleporter traveler is spawned, allowing travel to other Level 3 buildings or higher. Bunkers must all be destroyed to claim any of the three territories.
4. Outpost- Requires 5 adjacent territories and 5 bunkers to remain (bunkers may be replaced with resources). Another base is in the middle of the encampment, which allows another place to place resources. 2 more bunkers are placed on the territories. The base must be destroyed with a bomb. There is a teleporter traveler in the Outpost. Bombs detonate in 5 min. and must be defused to prevent explosion.
(To be added later, since it would require 10-15 players to take down. This is something for an event if the game picks up and EA has lots of players for this event)
5. Fort- Requires 10 adjacent territories and Outpost buildings remaining (Outpost buildings may be replaced with resources). A fence surrounds the territories lined with large structures that look like sniping spots. This is really hard to take down and requires a bomb to be planted in the structures around the fence. Bombs detonate in 5 min. and must be defused to prevent explosion.
Rules:
1. The main base cannot be destroyed.
2. The event lasts for 3 hours
3. There are 25 territories (add more later possibly)
4. Anything is allowed. Any gear, SS, magic, w/e.
5. Only the leader may upgrade buildings.
6. Leader may replace lost buildings for resources.
7. Bunkers are destroyed with guns and other normal means.
8. Extra bases are destroyed with a bomb object.
9. Everyone starts with a stackable item of 1000 flags (or may have the ability to get more).
10. Everyone has an extractor to allow extraction of special minerals for base upgrades.
11. Whoever has the most points at the end is the winner.
Ways to gain points:
You gain points in real time, based off territories and structure upgrades.
Killing enemies.
Destroying buildings.
I haven't gone into detail as to point specification, resources required to upgrade buildings, etc... This is a just a generalization (Heck, I originally had a lot more and went crazy with it, but I was 1/4 done and knew it would never happen

).