Rule #1 of RSS

If you’re going to launch a site with RSS, and it’s mostly “Coming Soon” content—it’s a movie site, and most movie sites follow this pattern of post-the-teaser-trailer-then-do-a-big-launch-later—then for god’s sake, don’t make the RSS feed one of the Coming Soon items. That’s the main purpose of RSS: to be alerted when there is more content on the site.