Congratulations to YouTube user tatermoog, you're King of the Internet today.
The potato fan was playing The Sly Collection on his PlayStation 3 when he realized that he had earned a Platinum tropy on each of the three games in the compilation. Tatermoog believes that this unlocked a new option on the Credits screen labelled "?????" Hidden behind these five question marks was a teaser trailer for Sly 4, which tatermoog uploaded to YouTube and which you can watch right here:
While Sony and Sly Cooper developer Sucker Punch have yet to comment on the video, it appears to be real.
Obviously no other details on Sly 4 have been revealed and they probably won't be until after Sucker Punch releases Infamous 2 in 2011.