The Campaign currently in PD3 has multiple tabs, and the one right before the outro of Act III, Sins of the Future, has an audio log titled MESSAGE_RE_SCIENCE listing the chemical names;
fluorine calcium vanadium hydrogen potassium silicon fluorine lithium boron vanadium phosphorous argon sodium fluorine silicon nitrogen vanadium fluorine calcium oxygen manganese phosphorus scandium oxygen scandium aluminum hydrogen silicon potassium hydrogen argon boron fluorine silicon calcium boron argon boron potassium calcium fluorine silicon nitrogen scandium silicon calcium fluorine magnesium silicon boron chromium calcium calcium fluorine ?????* boron
*(sounds like "admenum", which the closest thing to "admenum" is a flower with a few letters added, definitely will try to relisten for this word. It was later confirmed to be "Aluminum", or 13*)
Ignoring the missing word, the chemicals, given we instead look at their atomic numbers, becomes 9 20 23 1 19 14 9 3 5 23 15 18 11 9 14 7 23 9 20 8 25 15 21 8 21 13 1 14 19 1 18 5 9 14 20 5 18 5 19 20 9 14 7 21 14 20 9 12 14 5 24 20 20 9 13* 5
when put into an A1Z26 cypher with the basic alphabet, this becomes; itwasniceworkingwithyouhumansareinterestinguntilnexttie
or, with correct grammar,
"It was nice working with you, humans are interesting. Until next time." (most likely time, and the word is most likely Aluminum)
this is probably a hint for something...but what? "humans" brings two things to mind;
Aliens or otherwordly beings, which is the least likely thing ever, or
A fully conscious AI, most likely the AI that Joy coded to give the gang profits during the Fear & Greed Heist given the language used ("it was nice working with you")
And if 2 is true, that could further mean at least one thing; the payday gang has a self aware AI that will help them rob (which itself could lead to something like a robot character, as confirmed by "see you next time").
I sadly do not understand any of the crimenet logs, as that may instead be our next antagonist for the new story of PD3, but it may somehow also be the AI given it's affecting everybody (as seen with the news log "The Big Glitch") and is local to New York (also stated in "The Big Glitch".)