Very interesting, this would mark the first time Microsoft bring one of their games to a PlayStation System that wasn't announced before they bought the respective studio.
Well unless you count Minecraft Dungeons, but I view the Minecraft IP a bit differently.
Wonder what else could be in the pipeline to make the jump to PlayStation. Ori?
The Switch port of Cuphead was actually spearheaded by Microsoft, not the Cuphead developers, so will be interesting to see if Microsoft approached them again asking if they wanted to make a PlayStation port.