I've seen various sources [including steve sansweet ]indicate that the animated series episodes would be 30 minutes, so approx. 22 minutes each i'd say, allowing for commercials.
I'm not sure whether they are planning to get 'clone wars' up and running and then have both shows in production together later on, or totally get it made and out of the way first.
IMO for a live action series you'd need an hour long timeslot to make it worthwhile. 30 mintes is a pretty short slot and more suited to comedies and soap operas. They'd probably be better off producing a number of mini-series' instead
I can't back any of that up with quotes, It's just what I seem to recall [and opine].