Most filmmakers create crazy movie websites that look awesome, but do nothing to help sell their movies. Don’t do that!
If you are promoting your movie online, you need to create a simple website. You should have a trailer, an about page, a buy now button, links to your social networks and an easy way for someone to sign up for your audience list. Additionally, adding a few dozen relevant blog articles will help you pick up organic traffic.
Anything else is egotistical movie marketing and bad business.