Well its gonna be hard for them to top the previous antagonist we have peace with all nations, and beast races, all the Ascions are gone and what few are around are living lives as normal folk, primals won't be a threat any more and with races now know the proper way to summon we could expect these false gods to come to our side again maybe? I guess we can go back to the voidsent being bad guys unless they have a redemption arc too.