ARTPOP era will be amazing, to say at least. According all the photos I've already seen on littlemonsters.com, it will be art. I can't wait~
I also hope that Princess Die will be on the album because I love that song so much. I have no idea what the original mix sounds like because Gaga has only sung the acoustic piano version on BTW Ball so far but she did acoustic version of Yoü And I in her live performances and album version was completely different from the live version so we'll never know. :3