I suspect what we're going to get next is something in the 30 year gap between RotJ and TFA. There's been a few books here and there in that time period, but for the most part LFL has been staying the hell away from that time period, only encorching at the margins of either end.
It APPEARS that a new animated SW series, written by Jen Muro, is in the works. Even after that inital report (and after she yanked at least one of the tweets), she's been dropping not so cryptic hints about a major project she can't talk about on her Twitter feed. Combine that with Dave Filoni's promotion to Executive Producer of LFL's Animation Department and it's not hard to add two and two togther.
The speculation is more the time period, but a post RotJ series really does seem to make a lot of sense for 'unexplored areas'. Highly doubtful it would star the Solos or Skywalkers, but one never knows.
This is still in devlopment though, and nothing is official yet. And given the lead time on animation we might not hear anything about it for months or even a year from now. If it doesn't wind up being cancelled for one reason or another.