When your film is the highest grossing movie of all time, sequel talk is inevitable. It's not surprising that we've been hearing about follow-ups to 'Avatar' for the past three years, but it's a little surprising how confusing and convoluted the sequel talk has been. How many sequels? When are they filming? When are they being released. Today, producer Jon Landau set the record straight. For now, at least.

First, here's a quick recap of what we've been told in past. Back in May, director James Cameron announced that he was done with filmmaking unless it had 'Avatar' in the title: " [I'm] in the 'Avatar' business. Period. That's it. I'm making 'Avatar 2,' 'Avatar 3,' maybe 'Avatar 4."

So you have that straight from the director's mouth: two sequels for sure and maybe a fourth.

A few months later, Sigourney Weaver (who will be part of the sequels despite dying in the first film) said that 'Avatar 2,' 'Avatar 3' and 'Avatar 4' were all on the way, but she couldn't say when or how long it would take. "I just show up," she said. Since rumors had previously swirled that 'Avatar 2' and 'Avatar 3' would film simultaneously, many wondered if this meant that three sequels would be filed at the same time, not two.

And now we have the final (?) word from Landau, who spoke to the Courier Post today. Amidst discussion about 3D technology and the future of filmmaking, Landau addressed the 'Avatar' sequel rumors: “We [are] doing two back-to-back, but not a third."

There you go! 'Avatar 2' and 'Avatar 3' will film back-to-back (for rumored 2014 and 2015 release dates). 'Avatar 4,' while a possibility, won't come until sometime after that.

How long until someone else on the production corrects him?