It may be Memorial Day here in the U.S. but the Fire nation is waging war against the rest of the world in the new Japanese trailer and TV spots for this summer’s The Last Airbender.  In addition, we have a behind-the-scenes glimpse at the construction of one of the film’s elaborate sets – and some thoughts from director M. Night Shyamalan on his first blockbuster project.

The Last Airbender is a big screen adaptation of the hit Nickelodeon animated series Avatar: The Last Airbender.  In terms of plot, the film will focus primarily on the events of the show’s first season as the Fire nation seeks to reign supreme over the Earth, Water, and Air nations.

Hope presents itself in a group of fearless fighters, most notably Aang (Noah Ringer), the latest incarnation of the Avatar, a figure who can control all four of the basic elements.  Upon escaping his Arctic prison, where he was accidentally frozen some 100 years before, Aang sets out with two water-bending siblings named Katara (Nicola Peltz) and Sokka (Jackson Rathbone) on a quest to stop the Fire nation’s brutal campaign to conquer the world.

With that in mind, have a look at the final Japanese trailer for the film:

Like the last U.S. trailer, this new Japanese advert is heavy on the dark visuals and effects-driven battle sequences of The Last Airbender and offers only bits of expository dialogue here and there.  That’s probably for the best as the acting in the film so far looks to be kind of weak – see Aang’s (lame) anguished cry of despair in this new Japanese trailer for case in point.

In addition, we have two new U.S. TV spots that continue to showcase the impressive sets, costumes, and CGI-animated elemental abilities of the Last Airbender characters.  While the slo-mo choreography of the battle scenes might seem kind of standard nowadays, the manipulation of the elements are a unique touch that helps make the martial art fights look more unusual and intriguing.

Lastly, we have a making-of featurette that reveals the construction of the Northern Water Tribe set for The Last Airbender and some bits of M. Night Shyamalan talking about the impressive scale of the film – which will be by far his biggest-budgeted project to date.

So what do you think?  Does it look like Shyamalan has a hit on his hands?  How do you think all the impressive visual effects will look in 3D?  Sound off in the comments section below.

The Last Airbender hits regular and 3D theaters in the U.S. on July 2, 2010.

Thanks to LastAirbenderFansOnline for the tip-off.