Probably worth posting this interview here again:
https://www.dualshockers.com/kojima-productions-shinkawa-tease-projects-famitsu-interview/ interesting interview about KP's future, seems like their plan is to make one big game, and release smaller, possibly episodic titles while the big project is in development. They also talk about how they...
www.resetera.com
In here Kojima and Shinkawa were discussing potential projects in the future. The gist of it was while making a big game project they are also going to look into potentially more areas of expansion, they mentioned the creation of smaller titles to pad the time until the big game, they are also considering creation of anime, manga and movies. Regarding games they also said that they didn't think Death Stranding was weird enough and they wish to make even weirder games in the future.