Dave Filoni spoke to USA Weekend's "Who's News" blog in advance of the Season 3 finale of The Clone Wars, and the interview contains a few noteworthy quotes, including some that give us a glimpse into the next season.
On George's decision to introduce Chewbacca: He very much wanted to see Ahsoka and Chewbacca together in an episode. He had a keen insight there to try and draw very clearly together the old films and this new saga in The Clone Wars. When you get the image of Ahsoka and Chewbacca together on screen, you really do start to make a connection that this is really one big story from George about the Star Wars saga year after year after year.
On Season 4's battles: You’re definitely going to see battles on the scale of likes you’ve never seen on The Clone Wars before. The bigger the battle doesn’t always mean the better, but in this case it’s pretty impressive what the guys have been able to render and get on screen for a television series.
On technological improvements: In the season finale, fans will get a glimpse of what Season 4 is going to look like. We take such a leap technologically and story-wise in the last two episodes, where the visuals are even stronger than they’ve been the whole series.
On character focus: Something that’s often hard for us to understand is the kids love a lot of the new characters we’ve created in Clone Wars, and as an older fan, though we get really excited about bringing in a Tarkin or a Chewbacca, these kids are completely into Cad Bane and Captain Rex. We’ll still do a mix, but we definitely are going to have stories that focus on some of the characters we’ve created for the show.