I wouldn't quite call it seamless. ;) Like Heath, I think your enthusiasm may have done ya a little bit of harm in the attempt at four themes. The building is solid (really like the wings on the fighter), but the mix doesn't quite do it for me, personally. All in all, a score of 3.
That's really good! However, there are a few things I would recommend: First, you should try making the Mysterion cube in the TIE predominant. Make it larger, and more conspicuous. Second, spell out for the judges what exactly you're blending. I had a hard time working out the four different themes at first. Thirdly, you should try setting up a scene or something. Maybe they could be fling down a jungle trench and the mysterion TIE could say, "I HAVE YOU NOW!" Otherwise, a fantastic take on the category, it's sure to get at least a four!