Director Michael Bay and Paramount Pictures teased fans last December, when they released an over two-minute announcement clip that gave fans a first look into the upcoming "Transformers 3" film, "Dark of the Moon".

It got moviegoers excited, but now the second trailer gives everyone an even better sense of where the movie's headed. The first teaser showed that the astronauts' initial landing on the moon in 1969 was just a cover-up for the US to investigate a weird crash landing on the Moon, when Neil Armstrong and his fellow astronauts encountered alien robots buried beneath the Moon's surface.

Now, in the new trailer, is shows that Decepticon Shockwave is the main villian, and as everything unfolds, Chicago becomes the battleground where the alien robots go from human annilation. In one part of the clip, a beam of light shoots into space, which seems to "awaken" a new batch of Decepticons previously buried on the moon, ready to wage war on planet Earth. From there, it's all action, showing Chi-Town being ravaged by a slew of Decepticons.

But, will the Autobots help this time. In one scene, Optimus Prime says: "From here, the fight will be your own," hinting at a war that the good robots cannot help the humans fight.

"Transformers: Dark of the Moon", which includes newcomers Rosie Alice Huntington-Whiteley and John Malkovich, opens in 3D on July 1.