I'm thinking there are many ways they could go for future seasons (even "infinite" ways 🙂 ).  For instance

• they could follow OG Jason, newly reunited with his family as they universe travel
• they could stick with OG universe/world and follow what happens there as many Jasons now exist there
• they could follow a different OG Jason (maybe one who made a decision to stay with Amanda in utopia Chicago) or a version of him who decided to take over the life of the Jason where his son was still alive).
• they could follow Amanda in utopia world, who likely will meet up with OG Ryan (although I have a suspicion this might come into play in the final season 1 episode)

I don't know if all are good ideas, but this story lends to tons of alternate stories that can be told.  Agree they have to be careful.  But it is a very fun show so far.