If you steered clear of the movie-related stuff then I expect you'd be fine. Even if you did use movie stuff, ethically/legally it's wrong but you might slip by just fine without any legal problems. It's a crap shoot that most of us are now staying away from, best not to even deal with TM names at all, rather than trying to get all inventive and try use them in a way we think won't infringe on TM's. Many domainers/developers still play with TM names and sites and get away with it... but that doesn't make it legal or right.
But, all that traffic/searches over the name won't help you much, with that keyphrase you'll never get a site anywhere near page 1 on search engines when your content doesn't match with the movie content that is being optimized and searched for... you'd have to build traffic to your site/s using hand-labor methods. Doesn't matter how many monthly searches a term gets, your site won't see much of that traffic unless you're ranked high up in the serps so people can actually see it when they search that term on the engines. I have some domains/minisites that get into the tens/hundreds of thousands of searches for that term, but since they have no hope of making it to Google page 1 due to all the competition, I hardly see a scratch of traffic on them. I get much more traffic from my niche names with fewer searches but which make it to page 1 and spot 1 on google for that term.
In other words, I'd rather have a niche name, build a minisite for it, based on a term that gets 2000 monthly searches, because I know I can get it to page 1 on the engines and all or most of those searches will actually see my site. It'll do much better than if I take a term that has 200,000 monthly searches in a dot.info or other ext. and build a site around those, because they simply won't make it close to page 1 on search engines and I'd be lucky if a couple handfuls of visitors saw it each month.
All this is presuming you're building simple sites. If you're pouring money and time into a huge site, marketing, advertising, link building, article submissions, then that's a whole different story.
Hope this helps
