The American League Central figures to be a much more competitive division that the 2015 edition that the KC Royals won by 12 games (over second place Minnesota). The Detroit Tigers, Chicago White Sox, and Cleveland Indians all acquired multiple impact players that should help them improve in 2016. Meanwhile, the bountiful prospects that jam the Minnesota Twins roster should benefit from another year of experience.
The Kansas City Royals are unlikely to win the AL Central by a double digit margin in 2016. In fact, they might not win it at all.
You can make a reasonable case for ANY of the AL Central teams winning the division in 2016.