Phantom Badlands Theory

For the morning post today, I wanted to announce a new theory of mine. There are new Diamond Nature archways, and one of them is based on the Phantom Badlands.

If all of the other designs are based on lands, this one might be, too. Could AJHQ be hinting that the Phantom Badlands might be the next land? 
And that's all for this post. What do you think about my theory?