It looks as though the Sly Cooper HD Collection is being broken up into individual digital releases on the PSN.
PEGI listings for Sly Racoon: Sly Cooper and the Thievius Raccoonus, Sly 2: Band of Thieves and Sly 3: Honour Among Thieves suggest that the games will release individually on the PSN later this month. The entire collection was released on blu-ray earlier this year.
Check out our review of the Collection here. Sly Cooper returns to Playstation 3 next year in Thieves in Time.