The official KADOKAWA anime YouTube channel released the first trailer for the upcoming Made in Abyss: Dawn of the Deep Soul movieThe film is slated to premiere January 17, 2020 in Japan. Sentai Filmworks has already announced that it will distribute the show in the United States.
Sentai Filmworks describes the show as:
Dawn of the Deep Soul continues the epic adventure of plucky Riko and Reg who are joined by their new friend Nanachi. Together they descend into the Abyss’ treacherous fifth layer, the Sea of Corpses, and encounter the mysterious Bondrewd, a legendary White Whistle whose shadow looms over Nanachi’s troubled past. Bondrewd is ingratiatingly hospitable, but the brave adventurers know things are not always as they seem in the enigmatic Abyss…
Source: KADOKAWA YouTube channel