Cosmic Book News has a source claiming that Episode VII will feature, in addition to Skywalker and Solo offspring, a Palpatine flunky:
A disciple of Emperor Palpatine aims to rebuild the Sith Armies of the Old Republic and destroy the Jedi where the Skywalker children will be thrust into battle and face their inner demons of their Skywalker lineage.
They also claim the movie will take place 30 years after the original trilogy, no shock to anyone who can do a bit of math.
It’s plausible, of course, but also fairly reminiscent of a lot of the early Expanded Universe plots, which were lousy with Imperial flunkies and random darksiders. (via)