FirstShowing.net found a New York Daily News interview of Quentin Tarantino, in which the director talks about what kind of film his next project would be:
Next up for Tarantino? "I'd like to do a Western. But rather than set it in Texas, have it in slavery times. With that subject that everybody is afraid to deal with. Let's shine that light on ourselves. You could do a ponderous history lesson of slaves escaping on the Underground Railroad. Or, you could make a movie that would be exciting. Do it as an adventure. A spaghetti Western that takes place during that time. And I would call it 'A Southern.'"
FirstShowing has also learned that Tarantino's next project will NOT be Kill Bill Vol. 3.