I’ll make a prediction (which might as well be a guess, this early) - if he’s still in good health and not in prison, he will either run in 2024 or he will work to sink the Republican candidate (and would probably succeed in that case). His ego and personal grievances will never allow him to step back from politics. He will devote the rest of his life to regaining power and getting revenge on those he thinks betrayed or victimized him.