https://www.gamespot.com/articles/kingdom-hearts-3-creator-discusses-dealing-with-ex/1100-6459917/

At E3 2018, Square Enix announced a short delay for Kingdom Hearts 3, pushing the title from December 2018 into January 2019. After a 13-year wait for a new mainline entry in the series, a few extra weeks wasn't a big deal, but it created questions nevertheless: Why was it announced at a concert instead of at Square Enix's press conference? Why was the delay necessary? What state is Kingdom Hearts 3 in?