Arby's has unveiled four new sandwiches, each with a mozzarella-topped bun. The chain has also hired Jenna Bromberg, former CMO of Papa John's, as its new chief marketing officer. These changes are part of Arby's recent efforts to refresh its menu and marketing strategy. The new sandwiches are currently under evaluation by the company. Bromberg's appointment comes as Inspire Brands, the parent company of Arby's, gets ready for its IPO.