How would you feel if you learned that the world in the show "Adventure Time" was the earth in the distant future?

To me, it is one of the saddest hypotheticals I can imagine. The world that was full of life and prosperity was decimated by a nuclear bomb with ice humans, humans fighting robots, and vampires were the few human survivors of which all except one are extinct including Marceline. We have all these imaginative lands like the candy kingdom, the fire kingdom, the grass lands, ice kingdom, nightosphere, mushroom kingdom, and cloud kingdom. And talking dogs. <br><br>So how do you feel imagining that our world takes such a turn?