Now I do think the idea of the origin of the gang is a cool idea. But you can look up pieces of the gangs past. Jack Marston has a lot of potential.
So I want Jack to ride along side with another character named Zack.
Here is my idea
Jack and Zack are in the end of the Wild West days. After WW1 in 1919-1920. Jack is killing in robing. Zack is trying to convince him to stop and he is living in the past. Jack wants to make the most of it before it ends. After more story. Jack's wife is being hunted by this kid. Zack thinks he can talk him out of it. Zack knew him for a while. They had a falling out.
Final battle. Zack tries to convince the kid he still cares for him. Jack pulls out a revolver with 1 bullet inside of it. Pulls the trigger. Zack jumps in front of the kid. Gets shot. The kid doesn't wanna take Jack's wife anymore. They gather around Zack. Zack dies.
The end. Jack is in Saint Denis. He has a revolver. He throws it in a pond. Accepting the Wild West days are done. He goes to an office and writes a book titles Red Dead By J Marston. End
That's all I have for my story so far. I will write more in the future.
Tell me what you think of those pieces of the story.