This theory is based around the similarities of the Iron Monger suit and the Hulk buster suit and could possibly lead to the mark of the creation of the Hulk Buster in the upcoming film, Avengers: Age of Ultron.
In the first Iron Man film, Tony Stark was taken captive and was forced to recreate Stark Industries' 'Jericho Missile'. But instead, he had come up with the creation of the Mark 1 suit during his captivity with a man named Ho Yinsen. After the escape, Tonys suits flight power had failed and he crashed landed in the middle of the desert. He abandoned the suit and was air carried back to the USA. Later on in the film, Obadiah Stane reveals to Tony that he had double crossed had and set the bomb attack on him while and the Head Leader, Raza and his men were looking for the abandoned armor. Obadiah Stane rebuilds the armor and upgrades the design into a much more powerful piece of armor.
Now to the point.
I personally believe and you guys may agree as well the Tony may have used the design of Stanes armor to create the Hulkbuster which was revealed in the teaser trailer of 'The Avengers: Age of Ultron' to stop the Raging Green Time Bomb, The Hulk as you may have seen that they go head to head in the trailer. This may not be certain ther could be a possible chance it can happen.
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