Sounds more like impending supersedure, but, unfortunately that is often common with nucs.
Is there any sealed brood yet? If so, are they predominantly worker cappings? Drone cappings in worker cells indicate laying workers (if no queen is present), or a drone laying queen. Either can be difficult to correct.
Even laying worker colonies or colonies with a drone laying queen will sometimes raise a drone larvae in a queen cell. So, just because it is a queen cell, doesn't always mean that the larvae inside is a potential future queen.
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