It's only been four years since Samuel L Jackson teased his way into the end of Tony Stark's movie like a fan-wetting afterthought, but it seems like anticipation for The Avengers has been setting the Internet a-buzz for far longer. Perhaps this is because, since the comic-book genre gained credibility again, we've all been waiting for the ultimate superhero crossover movie. With Avengers Assemble, we get just that - four superhero leads meeting up for one mega-blockbuster movie in a way that has never been seen before. As a result, it is the ultimate summer event movie. It also happens to be Marvel's masterpiece.