Yes, there are more. DM me. #kingdomhearts— Seth Kearsley (@SethKearsley) May 6, 2018
Till this day, it's unknown whether SQUARE-ENIX or Disney will greenlight a Kingdom Hearts TV Series again.
UPDATE: It seems that you can place a bid on the Kingdom Hearts TV series storyboards. Indicating that you can bid and buy on Seth Kearsley's Twitter account. I personally would love to have one for yourself.