I'm not 100% on what has been confirmed by the filmmakers in the EE out later this year, but here are a few additions I'd like to see:

- More Beorn

- More Necromancer

- More Mirkwood Forest

- More of Laketown (particularly with the Master)

- More dialogue with Smaug

What are more additions/extensions you'd like to see?

"You're a woman, Harry"