It's obviously Gaga or Lana. I remember there being a big concern after "Cake" was released that Lady Gaga was going to do nothing but trap music on ARTPOP, so that fits the description. Plus, if it's the second volume of ARTPOP it would logically follow that it will share musical themes with the first album, and Gaga did say she wanted the second volume to be more experimental so that would fit the description of it being psychedelic and dark. As far as Lana goes, she herself said that the album would be dark and insane, and after the massive success of the "Summertime Sadness" remix, it wouldn't be too far off for people to think she might adopt a sound like that. Just my two cents.
I think it's Rihanna. Her last album was relatively dark. It had notable trap elements. She has been in the studio extensively and is known to make her albums quickly, with little news. She could also easily fit the "psychedelic / guitars" part.
Oh wait, I know who this is. It's Sia. Everything fits and her album has been ready since last year and she talked about possibly releasing the whole thing at once without fanfare.
People might think she was going to do "trap" but she's going to stay true to her craft. And judging by what people say on ATRL, most people don't know what trap is anyway. So SIA is my first choice, Lana second
Oh wait, I know who this is. It's Sia. Everything fits and her album has been ready since last year and she talked about possibly releasing the whole thing at once without fanfare.
People might think she was going to do "trap" but she's going to stay true to her craft. And judging by what people say on ATRL, most people don't know what trap is anyway. So SIA is my first choice, Lana second
But who was expecting her to go trap? I think that's a ridiculous notion considering it's Sia.