I guess as long as Team Asano and the Dragon Quest team are still able to develop and release games on Nintendo platforms, then I guess that’ll work. Sony hasn’t bothered getting into the HD2D trend as Live a Live, Octopath Traveler, and Triangle Strategy have yet to release on either PS4 or 5. I’m guessing the DQ 3R will come to PS4/5 but the focus will be on the Switch since it’s the dominant platform in Japan and it’s where it’ll get most of the attention overseas since there’s a user base already established on Switch.
Plus Nintendo has a close relationship with Square Enix regarding the DQ IP. Why do you think they announced XI coming to Switch at the time it was just called the NX? Plus it was announced for 3DS alongside the PS4 at the time. Nintendo has marketed DQ really well, even giving the Heroes from DQ XI, III, IV, and VIII a spot in it’s supposed Video Game Hall of Fame in Super Smash Bros Ultimate.
Nintendo should be aware of what could happen with Square Enix so if they can at least maintain DQ and Team Asano on their platforms, they’ll likely be happy as modern FF is not likely coming to even their Switch successor and Square Enix may still not care to put enough effort to get KH on the successor in an actual digital or physical form.