Thief, or once called Thief 4, has it's planned announcement trailer leaked a day earlier. You really can't keep anything under wraps for too long with the internet on the case, so we get to see the first cinematic trailer for Thief a bit earlier than expected. Have a look quick! Before Square Enix does anything to the video.
Thief is an official reboot of the Thief franchise, it's a next-gen title and is being developed over at Eidos Montreal(Deus Ex: Human Revolution). Garret and his bow returns in 2014 on PC, PlayStation 4, and "other next-gen consoles", which pretty means the Xbox 360 successor that Microsoft hasn't revealed yet.