How will the faction war rewards change when Argonites are added?

Don't know how Plarium did it when shadowkin and sylvan watchers were added or if they said how it work. Will the rewards stay the same with the 63 new stars being added in between current rewards making it take longer from one rewards to the next..will they just add new rewards for the new stars mixed in with the old rewards..if you already have Lydia and theres new rewards will you automatically get them..lots of questions.