"...when 'Tony Stark' tries to jumpstart a dormant peacekeeping program, things go awry and Earth’s Mightiest Heroes, including 'Iron Man', 'Captain America', 'Thor', 'The Incredible Hulk', 'Black Widow' and 'Hawkeye', are put to the ultimate test as the fate of the planet hangs in the balance. As the villainous 'Ultron' emerges, it is up to 'The Avengers' to stop him from enacting his terrible plans and soon uneasy alliances and unexpected action pave the way for an epic and unique global adventure..." - Michael Stevens @ IMDb
No movie review yet. – Metacritic
No movie review yet. - RottenTomatoes
We ought to mention that it does not take closest competitor to IMDb the way it gets more reputable daily. Getting back towards the movie, it really is rated pretty high here and possesses many positive reviews.