Once again, these three actors are interviewed, this time by HeyUGuys.co.uk. This time, they all three tell us the The Hobbit: The Desolation of Smaug will be darker and less lighthearted than An Unexpected Journey. There will be more character development from Thorin Oakenshield, who has not yet made his last err in judgement, and there will also be quite more horrific creatures than the trolls or even the goblin king, not the least of whom is Smaug, and the terrors within Dol Guldur. . .
Source: HeyUGuys (Youtube)