Doing a nine month filibuster is impossible, not ballsy.
The nominee will be confirmed before the fall session of the court. The task for the GOP is to make the public aware how ideologically alien the person is.
Last poll I saw said 75% of the American public wants Oboma to appoint a moderate.
The GOP has little chance in making the public aware of how radical the nominee is without using or threatening to use the filibuster. Regardless, the GOP will attack and the left will spread blatant lies leaving the public confused.
The result is that a significant portion of the public will be in the dark until well after the nominee is confirmed.