Senior Special Effects Supervisors Dan Lemmon and Joe Letteri revealed the status of The Hobbit: Battle of Five Armies in a recent interview.

"The Hobbit's going great. We've got a lot of stuff already turned over to Peter, we're in the middle of it, we're cranking through it," said Letteri to Collider.

Letteri also discussed the plot of the final battle in the last film of the popular The Hobbit movie trilogy, "We hope so, that's the whole idea. You've got all these worlds of Middle-earth-when I say worlds I mean the elves and the orcs and everyone sort of coming together in this final battle. It's got to give you that sense that if this isn't won, there is no Lord of the Rings; everything's over at this point. So this has to happen, and that allows the sort of peaceful interlude you have before the next trilogy starts," said Letteri.

In the interview, Letteri also hinted why the title of the movie was changed, after it was formerly known as The Hobbit: There and Back Again.

"Yeah because it is the climax, and you really just need to know that there is another battle for Middle-earth. The whole extension of The Hobbit's story has really been to get us to the point where we understand when we leave it what's going to happen when you pick up the Lord of the Rings trilogy, and this really does kind of set that tone," said Letteri.

The Hobbit: Battle of Five Armies is expected to arrive in American movie theaters on December 17, 2014.