DICE has confirmed that they have visited the famous LucasFilm Museum to scan key models from Star Wars. However, the museum only houses models from the original trilogy and not the Clone Wars Era. Also, Star Wars Battlefront is being described as the following according to EA's official Star Wars website: "Fight in epic Star Wars battles on iconic planets and rise through the ranks playing as the heroic Rebellion or the evil galactic Empire."
So when will we see the Clone Wars Era, if at all? Star Wars HQ discusses it in the latest episode.