In an interview by Ruliweb, Tetsuya Nomura, the director of the Kingdom Hearts games, stated,

Some fans are still fixed on the idea that the games need to be ported to the PS4, saying the glitches and load times in the original two ports are unbearable and need to be corrected. However, others say PS4 ports will never happen because of the contract Disney and Square Enix made for the two games. On a GameFaqs forum about the issue, one blogger discussed his thoughts:

As depressing as such news can be for Kingdom Hearts fans, at least the community knows Square Enix will be putting all of their focus into creating Kingdom Hearts 3. After all, fans have been begging for the third game’s release for much longer than they have been requesting PS4 ports.