Without a doubt, one of the highlights of Avengers: Age of Ultron will be the fight between Hulk and Iron Man wearing the Hulkbuster armor. We knew this will be big ever since Marvel released the first concept art for the film, teasing an uneven battle between the two "“ and we still didn't know why it was uneven, given how massive the Hulkbuster looked near the Hulk.
And now we had the trailer, which put everything in a different perspective. Until then, we had no idea as to why the Hulk will become so enraged that he could attack is fellow Avengers Tony Stark. Blame it on the anger, right?
And we thought that Scarlet Witch had cast a spell on the Hulk and Iron Man went to stop him.
We may have been wrong.
The revealing Lego Set

But now we have the Lego Sets "“ and the German version contains one called Hulkbuster Rescue Mission, in which we see the Hulk entrapped in some sort of device, Scarlet Witch hovering above him, the Hulkbuster suit looking mighty offensive and Ultron.

