Marvel’s Batman analog with multiple personalities wouldn’t even need to be summoned to make an appearance. It’s easy to imagine him stumbling onto the same villains while investigating his own case, and with his upcoming comic series supposedly focusing on weird crimes, it would be logical that Coulson’s team and Moon Knight could bump into each other.
If the all white costume is too over the top for a more grounded TV show, no big deal. Marc Spector knows disguises. he also has some cool tech, which would fit in nicely with what we’ve already seen from Fitz and Simmons.