According to Klei, the developer of Don't Starve and Mark of the Ninja, a new game is coming from them, and it will be announced during the PC Gaming Show at E3. The announcement was made via a Tweet from their official account.
Aside from the excitement there, there is also loads of new info on Klei's latest game, Hot Lava, which is a very literal take on the old childhood game where 'the floor is lava.' This info was released via an Imgur post from the developer.