It is pretty unlikely, for the historical reasons why there
Suppose in 1862 a large scale slave rebellion occurred somewhere in the Deep South. Would the North view these slaves as allies against the Confederacy or as another faction of rebels that will have to be defeated to regain control of the country? How would they view the Union pre-Emancipation Proclamation? Is there any chance that the revolt could be successful with the Confederate Army's attention divided between them and the North?
It is pretty unlikely, for the historical reasons why there were (in a relative sense) so few outright "rebellions" (as opposed to resistance and escape) by the enslaved; having one's family in the front lines, so to speak, in a slave society where arms and organization were monopolized by the slaveholders and their allies was a recipe for disaster.
There are reasons why the rebellions led by Turner, Prosser, Vesey, etc all failed - manpower and organization and equipment was all against the enslaved.
US policy was, as clearly stated by Lincoln, for those liberated (by themselves or by US forces) to refrain from violence, other than in self-defense, until they could come into contact with US forces, as in:
And by virtue of the power, and for the purpose aforesaid, I do order and declare that all persons held as slaves within said designated States, and parts of States, are, and henceforward shall be free; and that the Executive government of the United States, including the military and naval authorities thereof, will recognize and maintain the freedom of said persons.
And I hereby enjoin upon the people so declared to be free to abstain from all violence, unless in necessary self-defence; and I recommend to them that, in all cases when allowed, they labor faithfully for reasonable wages.
And I further declare and make known, that such persons of suitable condition, will be received into the armed service of the United States to garrison forts, positions, stations, and other places, and to man vessels of all sorts in said service.
And upon this act, sincerely believed to be an act of justice, warranted by the Constitution, upon military necessity, I invoke the considerate judgment of mankind, and the gracious favor of Almighty God
Best,