I don't want the movie to be about a bunch of old men and robots. The fact is that Star Wars was a generation ago and it's time to pass it on to a new generation.
I'd like to see a couple of young adults maybe two who aren't particularly good, maybe smugglers or bounty hunters. They live 30 years after the events of Jedi. The Empire is gone but the Republic isn't back, it's a strange dangerous no mans land. The two kids come into conflict with a Galactic threat and they don't know what to do or where to turn.
One of the boys suggests they go to the Jedi academy and plead for help, but the other isn't even sure if Jedi are real anymore. They go to the planet and search the ruins facing off strange space creatures until they a devastated temple. They enter and look throughout the desolate building and find an old Luke Skywalker alone speaking to what appears to be himself but referring the unnamed figures as father and master.
Luke senses the two enter and warns them that if they wish him harm they best leave now. The boys ask what happened what the place is and Luke explains they are within the Jedi academy and complains that the task at hand was too much. Explaining how difficult it was to rebuild the broken Jedi order and how all of his students fell to the darkside, and without the Jedi to guide the Republic it too has been left in shambles.
The boys plea for Skywalker to come out of retirement and help them but Luke is relluctant, stating that at least Empire was stable, he can only make things worse. The Spirit of Obi-Wan reminds him of the reluctancy Yoda once had to teach him and potential of the young men as Jedi. Ultimately he agrees and throughout the movie begins to offer one of the boys training to become a Jedi...
Then trilogy should be about Luke using what he has learned to help this young man rebuild the Jedi order, and save the day.
In sequels while the hero is being trained by Luke and rebuilding the order, the other main characters should meet widowed Princess Leia Solo and Lando, who help them in rebuilding the Republic.
All in all as long as they balance the adventure of the non force related characters with the Jedi stuff I think this could be a pretty cool trilogy.
EDIT: Perhaps bring in the evil child of Han and Leia from the EU and have him be Lukes greatest failure and a reason that Leia no resents him? Could make an interesting enough antagonist for the trilogy.