Seeing what Luke is up to after ROTJ should be worth the price of admission. Remember this shit is canon.
The extent to which any of this will actually be regarded as canon has always been kinda questionable to me. I don't expect it to contradict the films at all, but I have my doubts it will interlock or be referenced in other SW media.
I'm pretty sure Luke and Kylo Ren are confirmed playable in the story.
If the story takes place directly after the Battle of Endor, it's unclear to me how they would fit Kylo Ren into it.