I really like the Homo Deus trials theories. The ARK's are all tests, and once you pass them, you ascend to Homo Deus. As seen by the ascension off of Aberration, the Earth is dying or dead. This is probably a test to find out who throught history is worthy of becoming Gods. We should have gone to another ARK after Aberration, but due to Mei Yin and Helena going to Earth by hijacking the Obelisk, they screwed up the order. I'm guessing the next map will have lots of ruins, disaster similar to Scorched Earth but deadlier, and craters. As for the boss, I'm leaning toward either fighting a God or the thing that is killing or killed the Earth.