Using what we learned from these leaks along with the new canon EU material (and TFA/TLJ) I sort of compiled the major plot points that the Force storyline characters go through between ROTJ and TFA from the info we have. Obviously if the leaks aren't entirely accurate (and they likely won't be, even valid leaks like MSW and TFA still got some big details wrong due to the nature of info being provided by phone tag and getting muddied a bit) things will change:
Palpatine:
-Escapes to the Unknown Regions after surviving his fall on the DSII to bide his time to plot his return and revenge where the Empire had been previously stockpiling super weapons outside the purview of the known galaxy.
-The remaining surviving Empire fleet fled to Unknown Regions as well as per Palaptine's contingency plan.
-Palpatine takes on a new apprentice, Snoke.
-Palpatine tasks Snoke to act as the figure head for reforming the remaining Imperial fleet into the First Order to keep his survival a secret until the time is right.
Snoke:
-Under his leadership (while secretly being following Palpatine's bidding) the surviving Imperial fleet is reborn as the First Order.
-Secretly begins to contact Ben Solo to tempt him to the Dark Side as it has been foreseen that Solo can bring the end of Luke Skywalker if he can be turned.
Ben:
-Ben is tempted by Snoke's promise of being the new Darth Vader and falls to the dark side.
-Ben becomes Snoke's new apprentice leaving Luke for dead and destroying his Jedi Academy, unaware of Snoke's true master.
-Snoke entrusts Ben with being the elite leader of the Knights of Ren, the strongest enforcers of the First Orders will. Modeled after their idol, Darth Vader. Ben is now known as Kylo Ren.
Luke:
-Luke starts rebuilding the Jedi by first training Leia, however she quits when becoming pregnant with Ben.
-Luke years later after exploring the galaxy to learn more of the history of the Jedi and the Sith takes on a new group of students including Ben Solo.
-Confronts Ben once learning of Snoke's corruption of him and has his school wiped out and is left for dead by Ben.
-Feeling guilty for being unable to stop the cycle of the dark side from happening again Luke flees to Ahch-To, the birthplace of the Jedi, to exile himself to try to end the cycle of destruction that the Jedi always leads to.
Leia:
-Trains with Luke to become a Jedi before stepping down once becoming pregnant with Ben.
-Leia as a senator in the New Republic is branded a warmonger as she is opposed to the Republic's decision to demilitarize as she believes they underestimate the true size and threat of the First Order.
-Resigns from the senate once it leaks that her father was Darth Vader, effectively ending her political career.
-Forms the Resistance to take on the rising First Order as the Republic refuses to act and declare war on this rising threat.
Rey:
-Palpatine discovers the identity of a child that he had and sends one of his underlings to kill them and their family as they may become a possible threat to him as Luke and Leia were for Vader before he turned back to the light.
-Palpatine's child and their spouse successfully hide their daughter Rey on Jakku before being tracked down and killed by Palpatine's agent.
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