Back in April, the Fire Emblem Cipher team shared most of the details for the upcoming Fire Emblem Cipher Festival 2019 events, to be held in Japan during June. Recently, they updated their webpage with a few more details.
Firstly, the merchandise listing has been expanded, beyond the single picture and simple list from before. There are now better pictures of all the products, plus a proper look at the crazy expensive A3 acrylic card. You can find the information in English further down this article.
Additionally, by popular demand, the Thracia 776 art exhibition that featured at Fire Emblem Expo earlier this month will be making a comeback at the Cipher Festival events. The exhibition showcased all the known official artworks plus some artwork from the ending sequence.