On May 11th you can look to find this book of twisted art for sale and purchase. It looks like it will contain pretty much what should be considered the game's Art Bible. That is a collection of all the game art and concepts for those uneducated in the design terms. Although it looks like it will only house the concepts and not the full assets. But at least you should be able to glean the overall story and certain events that will play out a month in advance, since it is sure to have environments, scenes and characters that would normally be kept secret until their part in the game.
If you are interested in this, we have a few sample pages below for you to soak up. It is not all that much for now, but I am sure if you get the full book, it'll be dripping with all the creative juices and spoilers you could possibly want before the game is officially launched on June 11th. That is if they don't have any delays. *Fingers Crossed*