With anticipation steadily building for director Peter Jackson's Hobbit finale The Battle of The Five Armies, the director has teased new details about the final installment, revealing that this sequel will end with a massive 45-minute battle sequence at the foot of the Lonely Mountain.

The filmmaker explains how planning such an immense sequence is as complex as shooting the scenes on location.

"There's a lot of logistics that have to be thought through. We have dwarves and men and elves and orcs, all with different cultures, with different weapons, and different shields and patterns and tactics."

The battle follows the five armies all vying for the immense treasure that is now left unguarded, after the dragon Smaug (Benedict Cumberbatch) took off at the end of The Hobbit: The Desolation of Smaug. Peter Jackson spoke about designing the landscape that would have to hold thousands of warring characters.

"Before we could loose the first arrow, we had to design the landscape itself and figure out, 'Okay, if we have 10,000 orcs, how much room are they going to take up?' Are they going to fill up the valley or look like a speck?' Then we could start drawing the arrows on the schematics."

A battle sketch that you can see below, along with images from the battle itself, reveals that the massive Eagles from The Lord of The Rings: The Return of The King and The Hobbit: An Unexpected Journey will return in this franchise finale. While the director admits that these creatures tend to just appear out of nowhere to save the day, here they are part of a much bigger plan. The filmmaker also discussed a rule he developed when shooting epic action sequences. To read more about that rule: CLICK HERE

In related news, EW also reports that Billy Boyd, who played Peregrin Took in The Lord of the Rings trilogy, will sing the end-credits song for The Hobbit: The Battle of The Five Armies, entitled "The Last Goodbye," which he co-wrote with filmmakers Peter Jackson, Fran Walsh and Philippa Boyens.