NEXT News premiers this month with an initial press run of nearly 5,000 and 11 ad pages. "The goal of NEXT News is to help national marketers better understand the evolving gay, lesbian and Generation X markets, and the numerous advertising vehicles now available in these markets" said editor and co-publisher George Sansoucy. NEXT News is published by NEXT Publishing Corp. A color page in the monthly is $600; a b&w page is $400. David Moyal is co-publisher; ad manager Rob Klar handles ad sales. Offices are at 227 East 56th St., 4th Floor, New York 10022; phone: (212) 750-5687.