Team Ninja literally just wrapped up Nioh 2 so it seems unlikely they'd have a demo ready to play that soon. Nioh 2 was released 3 years after Nioh 1 (with their first demo, the Nioh 1 alpha, being 10 months before the full game came out), and Nioh 2 already re-used a lot of assets from Nioh 1 too, but now suddenly they have another big project ready to go with the Final Fantasy IP attached with entirely new assets, demo-ready barely a year after their last game came out?
I dunno, seems like a stretch. I wonder if the dev is Koei Tecmo but not Team Ninja, or TN just partially contributes like they did with a bunch of other games. Team Ninja doing the combat would excite me, but anyone else... nahhh
I do know teams can work on multiple projects, and maybe Team Ninja is bigger than I thought, so I'll happily eat crow if I'm wrong.