Re: If you had to bring in the REAL Mandarin how would you do it?
Id go a different route... Id reveal that AIM stole the Mandarin name and persona from an ancient legend, then tie the ten rings to extraterrestrial tech. The real Mandarin has been imprisoned and events from one of the other franchises inadvertently releases him. Id also have him trying to release Fin Fang Foom. Play it off as tony vs Tech and Physics he doesn't understand....
Isnt it past your bedtime?