The Purpose? To bring the fight between the Arm and the Core somewhere it hasn't gone before. And where would that be? The Upper Stratosphere
I'm not going to be using this as the backdrop for my final map, it was taken at a low-resolution and then enlarged, and I'm not entirely content with the terrain below.
What will the actually immediate field of battle be? still working on it.
here are some images:


You can download it here:
http://www.fileuniverse.com/?p=showitem&ID=3181
Remember when looking at it ingame, the two small platforms (off-screen in the above images) are inconsequential