Group founder Young wo n't be returning , band says . Young has been suffering from an undisclosed illness . His nephew , AC/DC , will take over , band says . AC/DC 's new album is due out in July .
AC/DC founder Malcolm Young wo n't be returning , band says . Young has been suffering from an undisclosed illness . His nephew , Stevie Young , will take over , band says . Group 's new album is due out in December .