After the success of some of its spin-offs that landed on Mobile, Nintendo she immediately became interested in this world in some ways parallel to that of the consoles. Having ascertained that the Super Mario IP has now been completely cleared for smartphones, there are still several titles that have not seen the light in a portable version, obviously leaving out the excellent hybrid possibilities offered by Nintendo switch.
Recently the analyst Dr. Serkan Toto of Kantan Games tried to predict that we will soon see some news about it, at least in the period that concerns the just started 2020.
At the time of writing, Nintendo still hasn't announced what comes after Mario Kart Tour for smart devices. The follow-up must be a big name, so I expect another hit franchise from the company to land on mobile in 2020, ie a Zelda app or Smash Bros (don't laugh) co-developed with a new partner.
Currently Nintendo has not yet announced what will come after Mario Kart Tour for smart devices. The sequel has to be a big name, so I'm expecting another franchise from the company coming to mobile in 2020, like an app from The Legend of Zelda or Super Smash Bros developed in cooperation with a new partner.