UFC on FOX 8 main-eventer and flyweight champion Demetrious Johnson holds the dubious honor of being the only current champ to never have headlined a pay-per-view event. But that could change soon, according to UFC President Dana White. “[Johnson] has been on a lot of big cards,” White told MMAjunkie.com (www.mmajunkie.com). “He’s going to fight on FOX again, and we’re in the building phase of that division. So the answer is yes.”   The 125-pound division made its debut in March 2012 with an unofficial four-man tournament to crown the UFC’s inaugural flyweight champ. Although delayed by a botched score early on in the competition, Johnson won the title this past September with a split call over Joseph Benavidez and in January defended the belt with a unanimous score over John Dodson