The "real" Mandarin was already hinted in Iron Man 3

but not distinctly.

Forgive me if this subject has probably been already discussed but it still needs to be put out there again because some people misunderstood the whole deal with IM3's Mandarin direction.

Ok first, Hail To The King is a very good short, very intense and great acting by Ben Kingsley and Scoot Mcnairy.

As for the "real" Mandarin being hinted in Iron Man 3:

Killian said to Tony: You simply rule from behind the scenes. Because the second you give evil a face, a Bin Laden, a Gaddafi, a Mandarin, you hand the people a target.

Of course, Killian used "Mandarin/Ten Rings" identity as a distraction to conduct his Extremist work, he & AIM were the villains. The "real" Mandarin and Ten Rings had nothing to do with the events of IM3.

However, the "real" Mandarin and Ten Rings did kidnapped Tony in the first Iron Man film.

So all this bitchin and complaining about "Marvel made Hail To The King to apologize fans" or "it's retcon", you're wrong. You dont need to watch Hail To The King to learn that theres a "real" Mandarin unless you want to learn it the easy way.

Killian is written as "The Mandarin" as far as IM3 but we dont know what Marvel plans to do with the "real" Mandarin, how soon or how later but in the meantime we must consider Killian as The Mandarin.