I looked at the 8 minute clip and loved the idea behind it and the look of it, but was taken out by a couple things that I think you should consider.

I love that this would set up the prequel story, like the prologue of Fellowship of the Ring. It explains what Darth Maul is talking about and should have been the opening of TPM!

That said, it's too much material in my opinion. It overstates every point. Bad guy shows up at temple, bad guy wins. Bad guy goes to Alderaan, bad guy loses. That's all the information in a nutshell. But the images go on through false ups and downs before getting to the point.

Just a thought. More later.