The veterans made it big in the 1980s and early 1990s and the band was known for its speed, intensity, and genre-crossing 1991 collaboration with Public Enemy on the rappers’ “Bring The Noise.”. Now they have signed up a virtually unknown singer. His name is Dan Nelson and he is a part-time singer and personal trainer from New York. “It really is a dream come true,” Nelson, 31, told Newsday as the announcement was made…