There is something off with Tanalorr, and that could be really helpful to resolve some of the issue we can have with timeline in Star wars.
First, I have to say that this planet doesn't look at a paradise at all (Greez also seems quite disappointed by Tanalorr at the end of the game). No fruit, no wildlife, only flowers and the force, that's a strange idea of a paradise.
Force sensitive person like Merrin and Cal feel something strange here and Kata don't like this place
This planet also obsess the ones who spend to much time in it : Dagan of course but even Rayvis still think of Tanalorr 200 years later and regret he will never see it again. And Bode who spend only a day and seems completely consumed at the point he doesn't hesitate to hurt his daughter during the fight
So I was wandering, is Tanalorr a hidden planet of more a LOCKED planet. A planet that could have been put inside the abyss to be unreachable for the safety of all. And it remember be of another "hidden planet" : Mortis.
And one point about Mortis is that the time run differently on it : Obi wan, Anakin and Ashoka spend several days on it but when they meet the clone they say they were disconnected only few minutes.
From that we can imagine different things for Jedi 3 : either Tanalorr work the other way around than Mortis, with one year in Tanalorr = 10 years outside, for example. And this can resolve the Yoda's "the last jedi you will be" from the OT, and allow a time jump without playing a 50 years old Cal in Jedi 3.
or we can imagine that Cal will need to save the galaxy from the new threat that is Tanalorr (and end trapped in it with Merrin eventually). After all, Cal is know for his bad judgment : find the Holocron only for the empire to take it / free Dagan only for him to fall to the dark side / bringing his new friend Bode to the hidden path. So I can totally seen him unleashing an ancient menace from the stars by trying to do the right thing.
What's your opinion on this ?