As we previously mentioned on March 17, 2013 in our article "Was Clone Wars Intended for 8 Seasons?". Star Wars: The Clone Wars was planned to have eight seasons. Friedman confirmed on May 16, 2014 via Twitter that all of the episodes through season 8 were written.
@JacobRegan18 All of it. And all of Season 8.
— Brent Friedman (@BFree63) May 16, 2014
Another piece of info Friedman shared was that another cool Yoda was a part of the future seasons.
@JacobRegan18 Yoda arc was in the Netflix bonus content. But there was another arc planned that also featured Yoda in a cool way.
— Brent Friedman (@BFree63) May 17, 2014
He goes on to share to titles and fortune cookies of two of the four Echo centric episodes that he wrote.
@JacobRegan18 OK, the fortune cookie of the 1st episode in my Echo arc (called "The Bad Batch") was: The best defense is a strong offense.
— Brent Friedman (@BFree63) May 19, 2014
@JacobRegan18 Here's the 2nd episode ("A Distant Echo") fortune cookie: Wars are not won with superior weapons, but with superior strategy.
— Brent Friedman (@BFree63) May 19, 2014
He said that he will share the other two over the next couple of days.
More information can be found in other tweets at https://twitter.com/BFree63.