Avengers: Age Of Ultron

All the heroes that together formed the Avengers have finally gotten used to work as a team. But then a witch by the named Wanda Maximoff decides to mess with Tony Stark's mind. Seeing the horrors of alien invasion first hand motivates Tony to build a suit of armor around the world, an army of robots that maintain world peace. This goes horribly wrong and now the Avengers have to work to fix this mistake.