Just announced that the new animated series is going to be Star Wars: Rebels.
It is to be set between Eps 3 & 4.
More details (and a video) can be found here:
http://starwars.com/news/new-animated-series-star-wars-rebels-coming-fall-2014.html
It does look like Disney are wanting to move more towards the OT and away from the PT.
2014 ‘Star Wars: Rebels’ animated tv series - Wookieepedia Page : Lucasfilm Wiki Page : IMDB Page : Wikipedia Page