With this little clone wars TV series they have going im sure they can take some ideas from it such as the stealth/commando droids.
BF1 had generally the same story line, of following a faction from Ep I, to the GCW days. BF2 carried much the same story, there's not need to cover new eras to make it different. Just because games like Halo had each version evolve with the story doesn't mean BF3 need to be entirely different. BF2 is a solid game that's fun, it just needs to be tweaked for better stability, and updated with slightly varied weapons and features.
Acta Non Verba