With the release of Hossin they will be trying to implement 'Continent Locking'
This is taken from the PS2 Roadmap:
Continent Locking (or the "Continental Lattice" in the post-lattice era) is on the horizon and will hopefully enhance the feel and depth of PlanetSide 2's overall metagame significantly. Here's what the basic plan looks like so far:
Each of our current continents (Indar, Esamir, Amerish) becomes a home continent for an Empire
Each empire has a single “Home Warpgate” on their home continent that can never be taken from them
All other warpgates can now change hands like regular territory (details here still being worked out, so let us know if you have ideas)
By taking control of a warpgate, your empire can now advance along any continental lattice connected to it
Hossin is given three warpgates, one connected to Indar, one to Esamir, and one to Amerish. There is no home warpgate on Hossin.
Battle Islands fall between continents on all the links not leading to Hossin