"I created something terrible" Robert Downey Jr's Tony, amid scenes of destruction from the giant mechanical enemy.
"You amazingly failed," agrees Black Widow - played once again by Scarlett Johansson.
There's in-fighting too with Thor throttling Tony Stark and Tony's Iron Man later battling The Hulk.
But it's not all death and destruction, as there also appears to be a romance blossoming between Black Widow and Bruce Banner.
The pair - played by Johansson, and Mark Ruffalo - are seeing getting very cosy together in one shot.
This is the third full-length trailer of the movie, which hits theaters on April 23.
It is expected to be one of the summer's biggest blockbusters, with the last movie making well over a billion dollars at the global box office.
It looks as though Johansson's Black Widow will be having more fun that usual as she jokes about "cleaning up after the boys".
In one scene she is seen picking up Captain America's famous shield, as she speed around on a motorbike.
* Avengers: Age Of Ultron shows in New Zealand cinemas April 23.
- Daily Mail
