.The Commander-

I thought i'd bring in Ahsoka fighting maul to reflect Star Wars: Ahsoka's opening chapter.

Instead of taking over Mandalore, Maul takes over Alderaan, and murders the Royal family, including Bail Organa.

Ahsoka ends up on Alderaan after Bail and her form the Rebel Alliance. On Alderaan, Ahsoka is leader of the Alderaan rebel cell, as well as recon missions.

As for the flashbacks, its a symbol of that all hope isn't lost. 

Family Runion

Obitine because, well, why not!

Luke and Leia are both 3 years old.

Leia wants to be a pilot and Luke is into his knights and dragons.

Satine and Obi-Wan have just been to Coruscant for a senate meeting by order of Palpatine. 

Padme lives on Mandalore now but Vader thinks she's dead. On Naboo, she has a fake tomb, where a few weeks after her funeral, Vader pays a visit to say good bye to his wife.

 Padme knows that he's alive after nearly throwing a tray of drinks over him.

As for Satine and Obi-Wan's relationship...... they have both signed the marriage certificate but they haven't gone through the stressful phase of planning and executing a royal wedding. (Obi-Wan desperately needs Anakin back.)