Obsidian teases something called Project Louisiana

The is a new teaser on Obsidian official website and in company Twitter account. Teaser contains a picture of smoking pipe (maybe axe) and a spica of wheat. There is also a mysterious text under the picture:

I used to dream that when my god came back, he would forgive us. That's the trouble with dreams. Sooner or later, we all have to wake up.

Right after teaser appearance, community started a log discussions on official forums regardin the topic. Main suggests are that this is a new Fallout or even Pillars of Eternity 2. What do you this this is?