If it wasn't already clear in the first two trailers, today's final trailer proves the highly-anticipated superhero sequel Avengers: Age of Ultron is truly epic in scope, both from a visual standpoint and from a story perspective. After setting the box office on fire with Marvel's The Avengers in 2012, director Joss Whedon returns to the helm for Avengers: Age of Ultron, although it seems that the complex nature of this sequel has surely taken its toll on the filmmaker. During an interview with SFX Magazine, Joss Whedon said that the expanded cast provided a serious challenge for the filmmaker, calling the process "a nightmare."

"Shoot me in the face! It is a nightmare. I long for the simple movies like Serenity! This is the hardest juggling act I have ever, ever tried to pull off."

Naturally, it's possible that the director was just joking about how much of a "nightmare" the production was, although it does seem that this will be his final Avengers adventure. The filmmaker revealed in January that it's "unlikely" he will return to make the two-part Avengers: Infinity War Part 1 and Avengers: Infinity War Part 2. Avengers: Age of Ultron features not only the returning Avengers, but also new characters such as Quicksilver (Aaron Taylor-Johnson), Scarlet Witch (Elizabeth Olsen) and Vision (Paul Bettany), not to mention the villainous Ultron (James Spader). The director added that they are all very different characters who essentially don't belong together in the first place.

"They're very disparate characters. The joy of the Avengers is they really don't belong in the same room. It's not like the X-Men, who are all tortured by the same thing and have similar costumes. These guys are just all over the place. And so it's tough. Honestly, this is as tough as anything I've ever done, and I haven't worked this hard since I had three shows on the air."

The filmmaker also confirmed once again that Mark Ruffalo's Hulk will be more prominently featured in the sequel, adding that he shot this movie much differently than the first, almost crafting it like a documentary.

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"There is more Hulk in this movie than there was in the last film. But what I'm excited about is we shot this movie very differently. I was running a lot of cameras, I was shooting long lenses, which I don't usually do. What I love is we have the opportunity, because we went in with this mission statement, to shoot the Hulk like a character in a movie, and not like a 'Look what we've got!' We have 'overs' - blurry 'Hulk's over there!' bits, very quick shots. Everything isn't, 'We built the Hulk so for God's sake you're going to watch him in this long take, full-frame, the whole time!' We really got to make him one of the characters in the movie. And that was a gift."

While it may have been a "nightmare" to shoot, the anticipation keeps growing and growing for Avengers: Age of Ultron, arriving in theaters less than two months from now on May 1. Are you glad that Hulk will play a bigger role? Do you hope Joss Whedon comes back for the two-part Infinity War movie? Let us know what you think below.