The trailer for "Miss Kobayashi's Dragon Maid: Luchia's Dragon" reveals the ending theme by Sachiko Kobayashi and insert song by Kotringo. The trailer shows Kanna's father and another dragon descending to retrieve Kanna and the Dragon Jewel. The movie opens June 27th, with CD releases of the opening/ending themes and a complete soundtrack, including Kanna's version of the ending theme.
Source: natalie.mu