The veteran thrash metal band's most recent LP was 2016's For All Kings . RIO DE JANEIRO, BRAZIL - OCTOBER 04: (L-R) Joey Belladonna and Scott Ian of Anthrax perform on stage during Rock in Rio 2019 - Day 5 at Cidade do Rock on October 04, 2019 in Rio de Janeiro, Brazil. Alexandre Schneider/Getty Images Trending on Billboard It’s been a decade since thrash metal icon Anthrax released a full-length album. But this fall, the group will return with the long-awaited follow-up to 2016’s For All Kings when they drop their twelfth LP, Cursum Perficio , on Sept. 18. Explore See latest videos, charts and news The news was revealed in an Instagram post on Monday (May 11) in which the band’s members assembled for a pic, with the caption reading “ It’s been more than a decade … but we’re back ☠️ 5.15.” The photo featured founding rhythm guitarist Scott Ian, singer Joey Belladonna, bassist Frank Bello, drummer Charlie Benante and lead guitarist Jon Donais.…