A source who was working On Terminator dark fate has informed that 4 members of guns n roses went to a private viewing of a rough copy of the upcoming Arnold Schwarzenegger sequel movie to see if they want to put a song on the soundtrack.   Apparently, Slash was at axls house to record overdubs on a song for the rush release.  At this point the song name is unknown.  But yes 100% verified. Guns n roses  new music.