Even though the PS4 is set to be released later this year there's still plenty of major titles on the way to PS3 including Beyond: Two Souls, Gran Turismo 6, Dark Souls 2 and Final Fantasy: Lightning Returns XIII. It now seems Namco Bandai are set to announce another game for the console in four day's time.
The consensus on the internet is that the game in question is titled Strelka Stories, though that's likely only the Japanese title, and is being developed by CyberConnect2.
Strelka Stories was first revealed in 2010 to mark CyberConnect's 2's 15th anniversary. The game is a space themed adventure starring dog-like creatures. Nothing about the titles has been heard since.
The teaser site shows the Earth in the distance surrounded by stars and simply says "New title. 4 days. PlayStation 3". Last week, it was rumoured that the game is a follow-up to Tail Concerto and Solatorobo: Red the Hunter.