To answer the original post. It depends on how much AJ wants it anymore.

If he still does then he could do what Lennox Lewis did at 30, and change trainer.

Lewis then went on a few fights to build his confidence back as well the the practice the refinements taught by Steward.

Will Joshuas team allow this to occur, some less high profile fights that don't fill a stadium in order to build back up again, get away from being gun shy and embrace a new Joshua.