In reply to Blue Straggler:
Correct. Since the original series was cut short after 3 seasons there were a lot of disgruntled fans left with a lot of loose ends. Deadwood the Movie is an attempt provide a satisfactory conclusion, set 10 years further on but most of the cast remain . Trailers suggest that the profanity count will be quite high, and followers of the first three seasons wouldn't expect anything less.