Here is a pinch of copium.
BNSS worked on Ace Combat 7 and has tremendous talent for the shooter genre while Nintendo IPs such as Star Fox and Kid Icarus lie dormant due to the lack of an internal studio to work on them.
Aside from their help with Splatoon 3.
It is clear that this studio is fit to be the main team for these dormant IPs and could later take Splatoon as support for the main team in Japan as well.
by aeseth