The phrase "next comptroller" refers to the person who will hold the position of comptroller in the future. It implies that the current comptroller will be replaced, and the next person will take over the role. Full definition
I am proud to endorse him to be New York City's next comptroller because we need his voice in this city speaking out for good government, good jobs and good schools.» (nystateofpolitics.com)
Did Shelly Silver wke up one morning looked into the mirror and asked Mirror Mirror on the way who should be the next Comptroller of NYS? (nystateofpolitics.com)
«He has my full support and I will do whatever I can to help him become the next comptroller of the City of New York.» (nystateofpolitics.com)