Hidetaka Miyazaki is a pretty iconic game designer at this point. His name is synonymous with the Dark Souls series and all of its side games like Demon Souls and Bloodborne. At this point, he is one of the most famous developers out there.
Speaking to GameSpot though, he has let on he is looking to try something new. He was careful to comit to too much but admitted change is on the horizon.
Dark Souls is my life's work. Everything I came up with for Dark Souls 3 is based on my personal preferences. However, Dark Souls 3 is also actually the turning point for the franchise.
He later went on to say:
I do want to work on something new. I'm pleased to hear people are interested in seeing that.
A lot of speculation has been that Miyazaki will take on Sci-Fi next, going into a totally new genre. When asked if this was the case, he said he 'definitely wants to bring the Miyazaki Touch' to it.
A Miyazaki Sci-Fi? As long as it is as dark and brooding as ever, I'm in 100%. I'd love to see it happen.