quote Dragoon
Although Moriarty did die in the original Reichenbach Fall, Moffat and Gattiss has explicitly stated the amount of freedom they have even when basing stories off of the original Conan Doyle stories, which to me hints that they could be the ones to, in effect, resurrect one of the greatest villains in Literary history.
If we're going by Doyle's original works, Moriarty really isn't one of the greatest villains in literary history.
CBS just commissioned a Sherlock Holmes pilot, also a modern update, but taking place in New York.
http://www.reuters.com/article/2012/01/17/idUS57473404420120117