Progression:

First attempt at inserting the models into the trench, but I had a hard time moving the models, as in the left TIE you could notice the skeleton a bit off.  Shows the details of the wings.  The trench needs some work.
Attempt #1: 

Here I added Darth into the mix and inserted one of the textures to replace the trench walls.  Still some adjustments needed in the models.  Also camera's a little off.  Had to tilt the walls in to get the proper vanishing point, kinda cheating but it works.
Attempt #2: 

Corrected  the camera perspective and the TIE models.  With this texture, looks like the death star was made from LEGO!
Attempt #3: 
 

Added proper lighting effect, more dramatic, but I do lose some details on the winds.  Bottom left of Darth's wing is really starting to annoy me.
Attempt #4: 
 

Used another texture to add speedlines to the trench, better (and longer) rendering techniques used to calculate the final image.
Attempt #5 (Final):