COMINGS & GOINGS: After 28 years and hundreds of made-for-TV shows featuring top gymnasts and skaters, Steve Disson has decided to hang up his skates. He insists retirement is not in his future, “it was just time to do something altogether different.” Disson’s first made-for-TV skating/gymnastics special, “The Sudafed Skating & Gymnastics Spectacular” in 1989, was not altogether different from his last: January’s “The Colgate Skating & Gymnastics Spectacular.” Each included Nadia Comaneci and Bart Conner, first as participants and more recently as hosts. “I had an option to continue procuring shows for ABC, but I just thought this would be a nice way to end it,” said Disson, the first marketer to work for ProServ, an original sports marketing firm and antecedent of today’s Octagon. Outside of skating and gymnastics, Disson produced events around basketball, beach volleyball and bicycling for networks that included ABC, NBC, CBS, ESPN, USA Networks, Bravo and the Hallmark Channel. As for what’s next? “Something in sports and entertainment,” he said. “I just wanted a new challenge.” …