1. I saw the hint saying that the Coopers have special combo attacks by pressing Square then Triangle. Reminds me of the Triangle-Triangle-Triangle-Square/X combos in Sly 3.
2. I noticed a Cooper mask symbol around 1:50 at the left of the screen. What the heck was that? Is that one of the new collectibles Glen was talking about?
Confirmed! The Cooper mask symbol I saw is called a Secret Sly Mask, which will teleport you to a hidden level. They're hidden collectibles that you will never know exist until you see them (unlike Clue Bottles, which you know are 30 per world or something like that).
@10Sly10 Maybe they're bringing lives back like in the 1st game?