So... apparently JMJ shared this on his Instagram.
From one of the FB groups
"It seems that this... whatever it is, is not so straight forward. Apparently, nobody knows who Deathpact is, according to various music websites. The last couple of years there have been viral puzzles, clues and a remix campaign that lead up to something, maybe an album. The JMJ remix, if it is that, is one of several remixes of a track that has not been released in its original form yet.
It seems to be some kind of clever online viral marketing aimed at creating buzz, not unlike how JMJ launched T&T without his name on the song. Mysteries and hints and a hunt for clues, Blair Witch Project style. The fact that JMJ shared a teaser video on his Instagram suggest there is some kind of link between the two artists, perhaps even a legit remix by JMJ."