Legacy Of The Force
Set further on from the events of the original trilogy, this series of interconnected novels finds the Galactic Alliance starting to splinter and trouble within the Jedi order caused by, of all people, Jacen Solo, Han and Leia’s son. The young Jedi causes a rift with his uncle by suggesting that force (and not necessarily the Force) might be the way to deal with unhappy systems wanting to leave the union.
How It Might Work
This gives plenty of opportunity to cast younger actors and launch a story that would be a sprawling, layered tapestry able to support not just a new trilogy but other movies to boot. You could still bring in the original trio as their original characters, but keep them in supporting roles around a younger principal cast.