He gets to have the exact same sorcerous potential as Stephen, and he will be trained to be Sorcerer Supreme no matter what. Dezmozoria's power is rendered utterly dormant in him insofar as it might grant him any super powers not related to Marvel style sorcery (if you think it might make him better at that, go ahead and say so). Otherwise, he is left to his devices. How does it go:
1. In the MCU
2. In comics
You can answer for Mikoto either before or after his face turn at your pleasure. If before though, can The Ancient One get him to chill the fuck out?
(honestly I was just thinking about how they were both performing improbable surgery during huge attacks on their cities)