Originally announced at EVO 2019, The King of Fighters XV was supposed to released in 2020. Then, its release window was moved to our current year and it seemed that development was going well: since February, there has been a character showcase every week (with some minor exceptions). Blue Mary was the latest fighter that received a trailer, making her the 21th confirmed character.
However, SNK has just announced that, due to a increase in Japan's COVID-19 cases, the development of the game was affected. Now KoF XV is planned to be released sometime during 2022.