Sony's making announcements later than ever, and Bloodborne is one example of that. The game was first revealed at E3 2014, and launched less than a year later. However, the platform holder had originally planned to reveal it earlier, under the name Project Beast. Unfortunately for the firm, this codename eventually leaked – but so has the title's original teaser trailer today.
As you can see from the video below, it looks very much like a prototype version of the game that we received earlier in the year. There are a few tweaks – the Cleric Beast is located in the church rather than on the bridge, for example – but many of the environments look familiar. The platform holder announced earlier in the week that some DLC is on the way, which we'll hopefully see next month.