The companies feel like there are more stories to tell about Obi-Wan during the rise of the Empire time period between Revenge of the Sith and A New Hope due to the high volume of viewers that have watched the show each week. If she ends up going to Tatooine, Obi-Wan will be forced to confront her once again, and possibly even kill her, because fans know that she doesn't actually get captured and brought to Vader.
After Vader and the Grand Inquisitor said a few words to Reva, they left her lying in the dirt and headed back to the Star Destroyer. Vader used the Force to pull it down as it was flying away, and after ripping the sides off, it was revealed that it was a fake transport to distract him from the real one that was able to escape. Obi-Wan, Tala, and Roken tried to lead everyone further into the base as quickly as possible, but Reva was able to break through and take out as many stormtroopers as possible. She was humiliated by Vader because she was one of the younglings at the Temple, and her rage and desire for revenge will be greater than before. The Grand Inquisitor walked in and stood by Vader, showing that he was alive and well, and that Vader had used Reva as a pawn to get to Obi-Wan.
Obi-Wan realized that her true motive for rising up the ranks of the Inquisitors was to kill Vader because of what he did to her and her friends when they were training to be Jedi. Reva arrived before the transports were ready to take the people away from the base, trapping them inside.
Obi-Wan's comlink that he used to talk to Bail Organa was dropped as he and the rest of the people left Jabiim. The Grand Inquisitor talks to Reva at the end of Episode 5 about revenge.
They were on their way to capture Obi-Wan once and for all after Vader ordered the captain of the Star Destroyer to set a course.
She developed a hatred for Darth Vader after the events of Order 66 and the horror of watching her friends be killed by someone they thought would help them. She would be siding with Obi-Wan, who she hates, if she were to turn completely away from the Dark Side. Reva questioned why Obi-Wan wasn't at the Temple to help her and the other younglings when he pleaded with her to help him confront Vader.
Obi-Wan requested to negotiate with Reva after the Empire tried to break through the main security wall. Darth Maul is the most famous survivor of the entire franchise, as he was cut in half by Obi-Wan and then came back in The Clone Wars. He pulled the two halves of her lightsaber apart, giving one to himself and the other to her, after toying with her for a long time.
Vader knew that Reva was one of the younglings at the Jedi Temple. She has had to fight her entire life, and after knowing her full backstory, she has one of the more tragic arcs in the entire franchise. The fifth episode of the series continued the story of Obi-Wan and his quest to get Princess Leia back home to Alderaan. Vader rewarded Reva for her actions and named her the Grand Inquisitor, a title she has been pursuing over the course of the entire series.
The final episode of the series was set up and answered many questions that were established earlier in the show, even paying off elements from the very first scene. If she makes an appearance in the finale to give an update on her status, it will be a good sign that there will be a sequel.
Reva was affected by Obi-Wan's words, as he speculated that she was a youngling at the Jedi Temple during Order 66.