I think the anime will not be new connent instead an adaptation of the mobile games

From the trailer we know that kingdom harts 4 is havely linked to the mobile games. Which our new longer available. This is major issue for fans that either did not realize the importance of them, was not a fan of the style, or new players. Square needs a way to present this information. They can either. Either they can rerelise the games like final fantasy resonance. Or I think far more likely based on the recent anocment adapt it to a new mediam