Until the end of this week, you can choose between five different possible scenarios for an upcoming third DLC (the first two being about Marisa and Seign).
https://eiyudenchronicle.com/survey/
Honestly, I think all of them sound great. I'd prefer the ones which seem to deal more with the lore (the desert and magic ones), but each of them sounds great.
DLC will be available at no additional costs for backers of the kickstarter campaign.