ちなみに結構早い段階でSwitchにレイトン出したいって言ってる
Switchでレディレイトン(レイトンミステリージャーニー)と次のレイトンシリーズを展開すると表明済み

2017年6月の記事
http://www.nintendolife.com/news/2017/06/feature_quizzing_akihiro_hino_on_laytons_mystery_journey_katrielle_and_the_millionaires_conspiracy
Why did you choose to release this on 3DS and not the Switch?

Hino-san: The reason why we chose the 3DS is because there’s a large Layton fanbase on 3DS given that we’ve released other Layton titles for the platform.
We wanted to cater to that original fanbase that we already have and has been with us for a long time.
Also, we are releasing it for smartphones.
The reason why we didn’t bring it to Switch is because we hadn’t started development for the Switch at the time that we were actively working on this game.
For the future, we’ll look into maybe porting it to Switch and making the next game in the series on the Switch.