Task: Question Answering
Input (English): Passage: On May 2, 2013, Jeff Hanneman died due to liver failure in a local hospital near his home in Southern California's Inland Empire; the cause of death was later determined to be alcohol-related cirrhosis. King confirmed that the band would continue, saying "Jeff is going to be in everybody's thoughts for a long time. It's unfortunate you can't keep unfortunate things from happening. But we're going to carry on – and he'll be there in spirit." However, Araya felt more uncertain about the band's future, expressing his belief that "After 30 years [with Hanneman active in the band], it would literally be like starting over", and doubting that Slayer's fanbase would approve such a change. Despite the uncertainty regarding the band's future, Slayer still worked on a followup to World Painted Blood. Additionally, it was reported that the new album would still feature material written by Hanneman.At the 2014 Revolver's Golden Gods Awards ceremony, Slayer debuted "Implode", its first new song in five years. The group announced that they have signed with Nuclear Blast, and planned to release a new album in 2015. It was reported that Holt would take over Hanneman's guitar duties full-time, although Holt did not participate in the songwriting. In February, Slayer announced a seventeen date American tour to start in June featuring Suicidal Tendencies and Exodus. In 2015, Slayer headlined the Rockstar Energy Mayhem Festival for the second time. Repentless, the band's twelfth studio album, was released on September 11, 2015. Slayer toured for two-and-a-half years in support of Repentless. The band toured Europe with Anthrax and Kvelertak in October and November 2015, and embarked on three North American tours: one with Testament and Carcass in February and March 2016, then with Anthrax and Death Angel in September and October 2016, and with Lamb of God and Behemoth in July and August 2017. A lone date in Southeast Asia in 2017 was held in the Philippines. 
Question: What group planned to release a new album in 2015?
Output (English): Slayer.