A collector who posts in a spanish forum called MadonnaSect has been saying that he had some of the demos recorded this year by M and held a little listening party with one of the users a couple days ago, who posted his thoughts on some of the songs:
"Unapologetic Bitch: Reggae. Weird. In the beginning it doesn't sound like it's M singing! But of course, it's her. It starts with a jamaican vibe and the she starts vocalizing (which reminded me of Diana King for a moment). There's a cool contrast between the title of the song and its melody.
Rebel Heart: I think this is the most commercial one, it's cool and cute. Here's guitar and voice mostly.
Iconic: It makes you feel like it's going higher and higher, but the chorus gets you down. With that title you would expect something more epic, but it didn't sound so at the time.
Veni Vidi Vici: A wonderful spoken intro, with melody. She doesn't rap, she talks. It has a surround mystic atmosphere. She names her old songs talking. The closest thing to the way she speaks in this song is the spoken part in Sanctuary, but don't take me too seriously. This is the one song that has got me the most hyped from the bunch.
Autotune Baby: The baby cry and the autotune thing are amazing!! But the chorus sounds like a different song, with a guitar.
Two Steps Behind Me: It has a pretty cool melody. It's obvious who the lyrics are about. Her voice is like really solemn.
Never Let You Go: I don't really remember this one but I did like it, that's why I remember the title.
Heartbreak City: The one about Brahim. It's ok, but too elaborated to be dedicated to him.
Trust No Bitch: It had some Michael Jackson vibes, like a darker and deeper Madonna (And not in a Erotica way). Very different.
Messiah: I'm not really a slow song person. This sounded like a mix between Falling Free and Devil wouldn't recognize you. If you like slow songs you're gonna love it.
The demos are all really different from each other and don't sound like something she's done before. There's a lot of guitar, but I suppose it's there to set the base in the demos and will be gone in most of the final songs. M's voice sounds amazing! I don't remember much about the other song I listened, but there was one that ended with the line "you're faker than your boobs" (Note: The exact english line was lost in traslation), another one sounds good for and interlude. There was a Pharrell track that sounds like Hard Candy 2. I also heard Holy Water, Devil Prays, Body Shop and Illuminati."
I personally trust him, that's why a wanted to share the post with you. I hope the demos won't leak before the album's release!