The long awaited sequel, Tron Legacy will hit theaters later this year in December, and fans have been holding out for over two decades for its return. The film will feature Jeff Bridges reprising his role as the main character, Kevin Flynn and we’ll see more of the extreme special effects Tron is known for but with an added boost.

Tron Legacy is following in the footsteps of its predecessor by offering us an amazing 3-D adventure with lots of action. The first film came out in 1982 and starred Jeff Bridges as Kevin Flynn, a man who learned the power of Tron the hard way. Tron Legacy will take place over two decades later, and center on Flynn’s son Sam (Garrett Hedlund) who’s just as tech savvy as his father.

It turns out that Kevin has been living in the world of Tron for the past 25 years, and Sam wants to find and release him. Aided by his trusted friend Quorra (Olivia Wilde), the duo embark on a life-and-death journey to escape the cyber universe that has become far more advanced and dangerous since the last time we saw it.

Over at MTV, they had the opportunity to speak to the film’s director Joseph Kosinski and he spoke about the differences between the original film, the sequel, and of course those inevitable Avatar comparisons.

“Our approach is not like Avatar, which I think is 3-D from the first shot to the last. Ours is sort of a Wizard of Oz approach. Ninety-eight percent of the 3-D is in the world of “Tron.” The 3-D really starts once we get into the Tron world. It’s a combination of technologies that [Robert] Zemeckis has been using in terms of the completely digital motion-capture of a character and for the live-action camera system. We used a camera developed by James Cameron‘s company. We used a newer generation of camera than the one used on Avatar. They built it specifically for us.”

He also spoke about Bridges’ character and how the actor will take on two versions of himself in the film.

“Jeff is playing two characters. He’s playing Kevin Flynn, the character from the original film, and he’s playing Clu, the avatar that Kevin Flynn created in the 1980s. I’d say he’s Clu 2. There was a Clu in the first film who looked like Jeff but was very simple in terms of his abilities. He’s very stiff. Clu 2 is a second incarnation of Kevin’s avatar. He doesn’t only look like Jeff, but he can think like him too. So it’s a whole new level of artificial intelligence.”

I remember at Comic-Con when they showed some footage from the film, there was an older and a younger version of Flynn in the Tron world. The younger was probably the 1980′s Clu, and surprisingly he didn’t have that creepy Magneto, Professor Xavier look they tried to pull off in the third X-Men film. He didn’t look cartoonish.

Tron Legacy hits theaters on December 17, 2010, which is conveniently the same week Avatar was released last year.

What do you think of Kosinski’s take on Tron’s special effects?