Every position player starter on the '15 Royals except Zobrist and Rios will eventually make the RHOF someday. So will Davis and Holland, and possibly Ventura. Way too early to make a call on Ventura.
A better question is will anyone on this team make it to Cooperstown? Salvy has the best chance, but he needs 5-7 more years like he had the past 2 seasons.