There is a strong risk that the new male will kill the infants of the dead silverback.
They could not wait for summer, then take new males and begin breeding back up.
The new male may achieve this in many different ways, including:
As a result, new males are constantly "created" and harvested.
If a new male takes over the pride, second thing he does is kill the cubs.
Young, subordinate females will do better if they mate with a new male.
Is it really possible to invent a new male?
The new male was emerging, but he wasn't quite there.
They're smart enough to grab new males now and then.
She would explain everything, even the new male she had met.