User blog comment:LoveWaffle/Thoughts on the New Iron Man 3 Trailer/@comment-5473242-20130305213457/@comment-3317214-20130309000051

Well, perhaps those villains were involved before they compromised the armours... Meaning that they needed the villains before.

And I'm assuming that the last scene in the trailer has the armours under Tony's control, and they look pretty beaten up. So, Tony could regain control of the armours, which would mean that they'd need the villains again.