I Guess Sly Cooper's Gone For Good Now?

Sanzaru Games is part of Oculus now, so it seems unlikely the studio will get the chance to resolve the cliffhanger it left Sly Cooper on.
Sanzaru Games is an Oculus Studio now and is unlikely to return to the PlayStation mascot.

So, What's Going On With Sly Cooper? (2023 Edition)

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Sly Cooper's Cliffhanger Could No Longer Be What We Expect

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Dimitri Lousteau, Sly Cooper Wiki