How would that work? At what point would he stop managing the under 21s, and start managing the main team, and what's the first team manager supposed to think of their temporary role while the club waits for Potter?His best bet would be to run a PL club’s academy and under 21s, develop them over a period and, if successful, take them through to the first team as manager. Not sure many clubs would have that level of foresight or patience.