Platinum Games has worked with a number of different publishers to bring their projects to the market, Nintendo included. That's the situation right now with Bayonetta 3, and it might explain why we haven't heard hardly anything on the title since its reveal.
In an interview with VideogamesChronicle, Platinum's Atsushi Inaba about their upcoming self-published game, Project G.G.. Inaba discusses what self publishing does for them, and how it paves the way for much more freedom when talking about the game.
We don’t have that much say over projects that we’re not publishing. And we understand different titles require different approaches, so we respect the publisher’s decisions. So if there is a difference between what we want to do with Project G.G. versus what we normally do with our other titles, it’s not really a criticism for those publishers: we respect their approaches. But for this title especially, our approach as a company is that we’re hoping to be more open.