Maybe Shigaraki is going to rescue him when he's strong enough? And then they will fight the ultimative battle against deku who will be able to use 100% punches?
Yes, He will be rescued by the league of villains with a bunch of nomu's.
All the nomus are dead or in prison, all for one will not be saved because they do not have enough power to break into the most secure prison, plus all for one is in no shape to fight anymore.
What do you think?