Originally Posted by Mr. Dent
They could have Coldblood, Madam Masque, and Spymaster team-up. Coldblood will be introduced in IM3, and Madam Masque may be set up as well. Spymaster can be the big villain they introduce in the film.
With rumors about Mandarin surviving IM3, Kilian the main villain
and so forth, I wouldn't be surprised if the big bad antagonist of IM4 is Mandarin
.Spymaster and/or Masque would be secondary villains then.