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

Game cover.
The end.

Sly Cooper the thief.