DiCaprio Wanted By Django?

According to the net, Quentin Tarantino wants "Inception" star Leonardo DiCaprio to play villain, Calvin Candie in his upcoming "spaghetti western" under the title of "Django Unchained". If DiCaprio accepts the role, his character is said to be attached to Samuel L Jackson's character in the film.
Other casting rumors: Idris Elba has bee rumored to be up for a role in the new film too. He may be up for the role of Django, which has recently been offered to Will Smith (rumor).