Why doesn't Smaug perish by the end of the 2nd Hobbit film but the 3rd? He only dies at the start of the 3rd film: Battle of Five Armies. Does Jackson say why?

Doesn't desolation mean a state of complete emptiness or destruction?

So why doesn't Smaug perish by the end of the 2nd Hobbit film if the film's title was made to describe his end? He only dies at the start of the 3rd film: Battle of Five Armies. Does Jackson say why?

Doesn't desolation mean a state of complete emptiness or destruction?

So why doesn't Smaug perish by the end of the 2nd Hobbit film but the 3rd? He only dies at the start of the 3rd film: Battle of Five Armies. Does Jackson say why?

Why doesn't Smaug perish by the end of the 2nd Hobbit film but the 3rd? He only dies at the start of the 3rd film: Battle of Five Armies. Does Jackson say why?

Doesn't desolation mean a state of complete emptiness or destruction?

So why doesn't Smaug perish by the end of the 2nd Hobbit film if the film's title was made to describe his end? He only dies at the start of the 3rd film: Battle of Five Armies. Does Jackson say why?

Doesn't desolation mean a state of complete emptiness or destruction?

So why doesn't Smaug perish by the end of the 2nd Hobbit film but the 3rd? He only dies at the start of the 3rd film: Battle of Five Armies. Does Jackson say why?