According to JAT all of Season 6 is done. According to, I think, it was an article on IGN, Dave Filoni said to the reporter in November last year that Season 6 was practically done. So there should be at least 20-22 episodes already completed. It is possible some of Season 7 arcs could have been in the midst of production and those are the ones that will be, being finished off. From what I've seen around the web, not all the team has been disbanded. Some are remaining on to finish off the work that still needs doing.