Everything We Know About Deadwood's Fourth and Fifth Season
The first episode would be the original season 3 finale. Bullock would refuse to resign and lock himself in his office in defiance until Al would come up and make a speech about how George Washington when asked to become king by the continental congress "Sheathed his sword" in response saying that this new nation would become a government of laws instead of man and so that's what Bullock must do as well. Ultimately Bullock is convinced and respects the electoral process.
The Series would end with Bullock, Charlie, and Jane leaving Deadwood, with Bullock leaving to become a US Marshall.
Al Swearengin would slowly lose power and influence over the camp over the course of the season, growing sicker and weaker from alcoholism.
At some point mid season the entire camp would burst in flame due to some "Jackass with fireworks", finally following through with build up throughout the series.
A flood would happen at some point to further destroy the town.
Manning would slowly be corrupted by Hearst.
Doc Holliday would appear
Jack Langrishe would encourage Alma to become a novelist.
The Love triangle between Bullock, Alma, and Martha would end in "status quo ante bellum" and be depressing.
The Earp brothers would return.
William Levingston the father of Standard Oil founder John D. Rockefeller and notorious bigamist psychopath would be the main antagonist of season 4. He'd be a conman selling medicine with a "Indian" (Actually a black man named Johnson) which would actually be booze, resulting in a conflict with Doc Cochran. Eventually Yellow Journalists would swarm the camp due to bounties offered by newspapers for evidence of his fathers wereabouts.
Aunt Lou would be explored and would open a restaurant
The Chinatown would be important and the following seasons would examine the ugliness of race relations in America during this period
Jane and Joanie would enter in a relationship that ends bittersweet.
General Fields taking care of Steve the Drunk would be a plotline
The town would be booming and growing larger, with Bullock struggling being fire chief.
Doc Cochran would die of tuberculosis
Langrishe and Al would form a rivalry
Johnny would go against Al, forcing Silas and Dan to take sides
The Theater Group and Jack Langrishe in general would be seen as Hearst's foil as they are trying to bring civilization in a humane way. The girl Claudia is Langrishe's daughter.
Hearst would return at some point and a lot of what happened in the movie would take a entire season long. Hearst would also buy out Merrick's newspapers, break a strike, rig elections, and bribe judges in an attempt to get his way while the town fights back against him.
Cy would have a complete mental breakdown and redemption arc.
Al would become more unstable and back to his season 1 personality due to alcohol abuse.
Martha would open up a school and become a leading member of society
90% of what happened in real life during this period would be replicated in the show, the rest being creative liberties.
Charlie would ask Joanie to marry him.
Sol being a mayor would be a major season 4 plot point, he and Trixie would get married and have a child
Al would be broke due to the banning of prostitution
Wild Bill's murder would be reenacted at some point, this becoming a town tradition.
Keep in mind that according to Milch some of these ideas may be reworked or cut had the season been greenlit, and Deadwood was a collaborative set, so the actors would add their own ideas as well.
