shoichi on 07 January 2018
The lead designer (Takihisa Taura) for Nier: Automata did say at the begining of 2017.
"From our perspective in PlatinumGames, if Square Enix pays us to do it, we'll make you a version for the Switch, we'll make you a version for the Super Nintendo if you want – anything you ask for."
http://www.nintendolife.com/news/2017/01/nier_automata_designer_is_open_to_the_idea_of_a_switch_port
So even though the probability is really low, who knows maybe Square did pay Platinum to work on a Switch port after the success of the system.
Still doubting this rumor though.
