OB1 is my favorite character from the prequels. I loved Ewan as OB1. There has already been rumors that there may be a Kenobi trilogy. And, how about the fan theories of Rey (from TFA) being Kenobi's granddaughter? Well, I took those ideas and my love of the EU and ran with them.
Things to keep in mind:
1. KK said that the saga is, and will be, about the Skywalker's. While Ben Solo is technically part Skywalker, I don't think that is what she meant. I think Rey is a Skywalker.
2. At present, TFA and most of the new canon stuff does not connect too much to the PT.
3. Pablo Hidalgo, in discussing the Legends title, said that they called it Legends because there is some truth in it. Even the last preview trailer for the 2nd half of Rebels' season 2 states that there is some truth in legends.
So, with that said, here is an idea I put together for a trilogy of Kenobi films...
First movie. Set just a few years after delivering Luke and Leia to the Lars. On a fateful trip to Mos Eisley, Ben Kenobi encounters someone he knows and with whom he fought in the Clone War. Desperate to avoid the Empire and, even worse, ex-Darth Maul, she asks Ben to help her. Little do they know that Maul has tracked Bo-Katan to Tatooine. Kenobi agrees to help her. They have a moment of intimacy, Ben fights Maul to allow her to escape. She does, but the Empire finds her a couple years later...with a daughter. The Empire kills the mother but is under orders to deliver the child to the Inquisitors. End of first movie.
Second movie. Set between ESB and RotJ. The daughter is a young beautiful redhead, but is dangerous. The Inquisitors discovered her force sensitivity and train her to be a spy. She is so good that the Emperor himself takes an interest in her. He, personally, gives her a secret mission. He has her steal the plans of the second death star and gets them to the Alliance's Bothan spies. At the same time, she tips off the Imperial forces that allow most of the Bothan spy ring to be killed. The Emperor praises her for a job well done, but she keeps her true feelings hidden. Deep down she doesn't like what she is doing. The last Bothan spy delivers the plans to Mon Mothma. The Emperor gives the woman a new mission...find and kill Luke Skywalker. End of second movie.
Third movie. Set several years after RotJ. The woman is a now a soldier of the New Republic. After the destruction of the 2nd death star she believed her master was dead and decided to complete her last mission. Over the years she has infiltrated the Rebel Alliance and now, New Republic with the goal of getting close to Luke Skywalker. However, he has been elusive thus far because he's been searching for jedi temples and has started training his sister and her very young son. She finds out that Luke is looking for more people with force sensitivity that he could train and submits herself for training. The training, however, brings out the good in her and, slowly she falls in love with Luke. This makes her somewhat conflicted, which Luke senses. Things happen, her and Luke get married and it ends with the birth of their daughter...Rey.
That's it. So Rey would be Kenobi's granddaughter as well as a Skywalker. And, obviously, her mother is modeled after Mara Jade, though, in the new canon could have a different name.
I also have an idea that, in order to actually continue the Skywalker name going past Ep. IX, in 8 or 9 we'll discover that: a. Luke's wife took their son with her into hiding, both were presumed dead when the Knights of Ren attacked the jedi. Or, b. Luke and his wife had a son after Rey, but the mother is dead. Either way, the son is revealed in 9 to fight along with Rey to defeat Snoke (whom I still think is Palpatine).
So...what do you think?