So, Luke dies. Then he's got this all new Jedi place, ran by his children or something. Then I guess we meet a protagonist, which will probably be one of his children, because it always his, but I hope not... Then, the antagonist will pop up, and he'll probably be some guy from Luke's past that doesn't like him, like those band members in the Mos Eisley cantina because they were in a bar with the guy that made them stop playing, and then he somehow saves the day. Yay!

Okay, then in the next movie it's just a typical adventure, but at the end stuff gets worse.

Then, the last movie is about him having doubts about the ways of the Jedi and exploring a darker side of himself only to come back enlightened and with an amazing way to save the day.

Wouldn't be surprised if that's how they turned out.