What's it for? Your guesses are as good as ours. A similar advertising campaign from earlier this year yielded just a video, albeit a pretty cool one starring live-action versions of recognisable PlayStation characters. But still, it was just a video.
If we had to take a guess we'd go for something related to PlayStation All-Stars Battle Royale - the appearance of Sly Cooper's cane and Sweet Tooth's blade in the video below certainly support the guess as both are characters in the brawler. Either way, all will be revealed tomorrow.