Dee Bradley Baker stated that there are more aliens that he doesn't even know about, which means, new aliens, possibly a new theme song, and maybe new characters. Also this is a secret. Kevin will be able to absorb power and not go insane in the next season. I have a source that says the next season is about a war in volving the tetramands. This might mean Ultimate Fourarms! Also if Vulpin is on the other side of the war, that might explain Ultimate Wildmutt.