Do you have the, uh, blues because you missed “Avatar”?

Well, you’re in luck. If you didn’t catch it during its initial run this winter or on DVD this spring, the “king of the world” of the box office is bringing back his peacock-colored Pandorans for a limited encore appearance … already.

But why so soon?

“It’s an interesting experiment,” filmmaker James Cameron said during a call from Los Angeles earlier this week. “Usually, a theatrical re-release comes on an anniversary or something.”

Instead, the biggest movie in history, by every financial measure, opens again Friday. The special edition re-release arrives on about 3,000 screens internationally, exclusively in 3-D, with nine minutes of new footage.

“We were forced out of the IMAX theaters and most of the good digital 3-D theaters in March because of commitments to ‘Alice in Wonderland’ and then other films. August was the next slot available for doing something like this,” he said. “Maybe nobody shows up. I don’t know.”

But Cameron said he believes there still is demand left from newcomers who waited because they wanted to see it the “right” way — on a big screen in 3-D — as well as from devoted fans ready for more multiple viewings. Those fans will be anxious to check out the extraterrestrial epic’s unseen computer-generated bits and pieces. They include a sweeping Na’vi hunt sequence and some emotional moments involving the central romantic relationship and the death of a beloved character.

But Cameron also has another audience in mind.

“I’d like it if kids in the age range of about 7 to 10 discovered the film — now that their parents have seen that it’s OK or maybe they’ve seen it themselves in a safe space, at home on DVD,” the 56-year-old father of five said. “I think children respond strongly to its environmental message, but also to the whole ‘I see you’ part. The spirituality of it, the ideas about breaking down cultural boundaries.”  

Kids better bone up, it seems, because the franchise might be with them well into their adulthood. The first of possibly many sequels could come in about 2 1/2 or three years, he said, and after that the possibilities are endless.

“We’ll keep making ’em as long as people keep wanting to seem ’em,” Cameron said. The director-writer-producer has in mind a “whole solar system, a whole universe” of Avatar stories to explore, he added.  

In the meantime, the man who made that other, previous, biggest movie ever — “Titanic” — plans to commemorate the 100 anniversary of the sinking of the doomed ship with a 2012 re-release. For the occasion, the famously sexy cruise-from-hell will be seen for the first time in 3-D.  

“Most of the recent conversions have been done wrong, too rapidly, just to cash in,” he said. So, Hollywood’s most successful technical innovator will take a full year himself to oversee the project and ensure that it respects the original.

Cameron said he took one thing from making “Titanic” that he brought to the making of his similarly enormous follow-up, “Avatar.”

“I learned not to lose heart. … I tell my crew on the first day, ‘We’re here to conquer,’” he said.

And that could be what his spectacle does this weekend, again.