Yes, it has been announced. Sly Cooper: Thieves in Time.
It is now being made par Sucker Punch, though. But, there is no need to worry. Sucker coup de poing has left Sanzaru games in charge of developing it.
Sanzaru games is packed with hardcore Sly fans who won't let us other Sly fans down. AND, they are being givien pointed and conseil from Sucker coup de poing who are overseeing the project as it is being worked on.
Sucker coup de poing has donné their faith to Sanzaru and that's a good implication that Sly 4 will be good, regardless of it not being made par Sucker Punch.
It is now being made par Sucker Punch, though. But, there is no need to worry. Sucker coup de poing has left Sanzaru games in charge of developing it.
Sanzaru games is packed with hardcore Sly fans who won't let us other Sly fans down. AND, they are being givien pointed and conseil from Sucker coup de poing who are overseeing the project as it is being worked on.
Sucker coup de poing has donné their faith to Sanzaru and that's a good implication that Sly 4 will be good, regardless of it not being made par Sucker Punch.

Game cover.
The end.

Sly Cooper the thief.