The latest game in the series, Kingdom Hearts: Melody of Memories, isn't going to buck this trend, as it's the first Kingdom Hearts game to show up on Nintendo's very own Switch. But in spite of its Switch version, Nintendo fans shouldn't hold out hope that any of the mainline games will ever show up on their console: according to Square Enix's Tetsuya Nomura, this is a one-and-done kinda deal.
Speaking with Nintendo Enthusiast, a translator confirmed the following:
"Tetsuya Nomura confirmed there are currently no specific plans for more Kingdom Hearts games on Switch. Square Enix did consider ports of existing games for Switch in the past but found that it was technologically difficult. However, Nomura added that he believes Nintendo Switch is a very appealing piece of hardware and he had always wanted to do something on this console. Additionally, while he cannot speak for games at Square Enix that he isn’t associated with, Nomura did express that it is possible another game of his could come to Switch."
So yeah, Nintendo fans are going to have to either grab another console or spend a few afternoons on the Wiki if they're going to want the full Kingdom Hearts experience. This is a bit strange, but when you consider that Persona 5 is taking a similar approach with Persona 5 Scramble: The Phantom Strikers, yet are still refusing to make a Persona 5 Switch port, you begin to wonder if maybe the problem is in Nintendo's court.
Given how they've been acting lately, I wouldn't be surprised.