
While there's nothing official at this time, it certainly does seem like one of the characters teased in the Project Treasure image could be KOS-MOS.

G-MODE will release Namco-developed game Xenosaga: Pied Piper as a G-MODE Archives+ title for Switch via Nintendo eShop and PC via Steam in Japan, the company announced.
Everyone: We want a Xenosaga Trilogy Remaster/Release/Remake!
Namco: We hear you! We are going to re-release a Xenosaga mobile phone game!
Everyone: wtf?
Now now... guys... Maybe this is part of testing the waters for either a trilogy re-release , remaster, remake, or a reboot?

With the success of Xenoblade Chronicles 3, this would be the perfect time for Bandai Namco to release a Xenosaga HD Remaster Collection.
Yes please, I know they said it was unlikely to happen, but I never got to play these games, so a collection would be greatly welcomed.

From a pitch for Final Fantasy VII to Nintendo's role-playing juggernaut, here's how the Xeno series became Xenoblade Chronicles.
not even close to the original Xenogears, this was a masterpiece in the story, characters, and adventures just like many PS1 JRPGs... something which is missing in almost all new JRPGs.
Nope, it is, not doubt it. So the game may be a crossover from different Bandai Namco franchises.
The Wii U seems to be building up quite a collection of niche games.
I love it!
I wonder what PT is going to be like...
Brawler? I hope so!
That's pretty obviously KOS-MOS.
COOL!!
She appeared in Project X Zone.
Xenosaga 1-2 are on DS in Japan so Wynaut?