In a nutshell, the character Ruby (the fortune teller from both stories) will play a more significant role in the last story. You'll see Jack and Lars, but not in so prominent a capacity. There is the possibility of introducing a new character named Jack for the sake of title continuity.
So my choices for the third story are narrowed to
- Jack of Clubs
- Jack of Spades
- Queen of Hearts
- The Joker