The striker, 23, who was once on trial with Newcastle, moved to Kingsmeadow from non-league Bognor Regis Town last January.
But he made just three appearances for the Dons before suffering a broken leg against Crawley in April.
Prior has now resumed light training and hopes to be in contention for a return to the first team in the new year.
A club spokesman said: "Jason will step up his training over this month and hopefully will be pushing to return around late January."
- Sports & Recreation