Images of the upcoming Hobbit sets have leaked on the internet. First we have a small set Dol Guldur Ambush which comes with a new Hero and 2 Orcs. I would guess that this should be 20 dollars but Lego pricing for Hobbit stuff runs really high so I would say it probably will be 25-30.
Next up we have Mirkwood Army which is probably fitting into the 50-60 dollars set window with 2 Orcs, 4 Elves including Elven King, and a Warg.
Lastly we have the Dol Ghuldor Battle Set which is probably going to be like 100 dollars but comes with Azog who was a show exclusive previously and Radagast plus what looks like the Necromancer. More images at FBTB.