Never too late to requeen, well almost never
Just make sure that there is no queen in there. I would like to know how the brood, if any, is doing. What is it, all drones? Right now is when the honey season turns out of the "red" as they say in wall street. It is the busiest time for them so they should have the most bees, most brood, and work the most to get honey for winter up here.