Killzone is an important PlayStation franchise, and one that should help to boost the Vita's appeal.

Killzone: Mercenary is now scheduled to launch on September 17, which seems like a a long ways off but remember, time flies…

And to whet your appetite, here's a new trailer entitled "War Is Our Business." It shows off some gameplay that is guaranteed to remind you of the FPS greatness found in the console iterations of the series. This title should really push Sony's portable in terms of technical capability, and in our estimation, despite its flaws, Resistance: Burning Skies proved that the dual analog setup for the Vita works very well for shooters. It actually makes them function correctly.

Here's hoping Mercenary is a must-play title for the Vita!