According to one of the more recent interviews, which was back on December before the final Smash presentation, he said how he couldn't imagine them developing a new Smash game without him, so it's a fair assumption that he won't be leaving the franchise to someone else just yet.
Since I have no class Wednesday, I'll be able to buy the Corrin and Bayonetta DLC and try them out.
Oh no, I definitely cannot see him leaving the franchise, it's his baby. But maybe they might get a new Director now that Bandai Namco in on board?