next in line
Definitions
The person or thing that is immediately following another in a sequence or queue.
The individual or entity designated to be the immediate successor for a position, role, or inheritance.
Examples
I have been waiting for twenty minutes, but I am finally next in line for the ticket counter.
Since the manager resigned, the assistant director is next in line for the promotion.
Please stay where you are, as you are next in line to receive your meal.
Synonyms
successor heir subsequent following prospective upcoming next