Watch Digimon Adventure tri. Part 5: Coexistence (2017)

Meicoomon rampages after witnessing Meiko Mochizuki being injured by the man bearing Gennai's likeness. "It would have been better if you hadn't been born..." Meicoomon disappears into the Real World, which has since become distorted. Possessing overwhelming power, she's the key to the world's destruction.