Wiktionary
hang in the balance
vb. (context idiomatic English) To be in a precarious situation, unsure of the future.
Usage examples of "hang in the balance".
She knew now that she never could have hurt him, though her galaxy hang in the balance.
Over the last years, she kept resigning her posts, and then allowing herself to be dragged back in, often poignantly reminded, or reminding herself, that a million lives could hang in the balance.
The breaths in the darkness beside him could have been Ta-Kumsaw on their long journey so many years ago, when Alvin had been called the Boy Renegado and the fate of the world seemed to hang in the balance.