A couple of little things you might like to try (more "possibilities" than "suggestions," I guess.
)...On the back tagline -- "How do you save..." -- you should be able to make it white and center it. Right now, it's not really doing anything, since it blends in so much. You might as well either take it out or let it draw some attention.
You could also remove it, bring the blonde down a bit, and increase the size of the quote. Or, better yet, remove it, bring the blonde down, and make the synopsis box taller. Right now, the vertical spacing between lines it a little tight.On the front title treatment, maybe add a little bit of light? Right now, it looks kind of flat. You have so much awesome futuristic atmosphere going around, but the title's gradient has a slight tinge of Microsoft Publisher word art. Either lighten up the blue a tiny bit or and a few pings of light on there, maybe?
The figure in the background on the front seems a little strange. Would a quick cityscape or action scene be a viable option instead?
Having the gradient on the title on the spine go in the opposite direction is a little off-putting. There's nothing technically wrong with it, but matching is always nice.
On the back image blend, maybe move the Willis one a tiny bit to the right and everyone else a tiny bit to the left? Every other image is so tightly packed, and then that left shot of him is all by itself right now.
I hope that doesn't come off as overly critical. I think you've done a fantastic job on the cover, with an awesome progression. There are just a few little touches that might take it to that extra level of fanciness.
I just love comments like these 
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