In 2012, Marvel's The Avengers set the bar for every superhero movie to follow, grossing a massive $1.5 billion worldwide while resetting the table for Marvel Phase Two. With the sequel Avengers: Age of Ultron just a few months away, director Joss Whedon teased a number of new details in an interview with Yahoo! Movies UK, including his attempt to spoil the "completely unhinged climax," the possibility of an Avenger romance, details about how the new characters fit into the story, and much more. While the filmmaker didn't necessarily intend for the sequel to be "larger" than its predecessor, Joss Whedon explains that is exactly what happened.

"Avengers: Age of Ultron got larger than the first film. I didn't mean for it to get larger, but the climax that I pitched was completely unhinged and nobody said no, so that's that."

There have already been plenty of rumors that Avengers: Age of Ultron ends with a new team of Avengers, leading into the first Phase Three adventure, Captain America: Civil War. The sequel does introduce Quicksilver (Aaron Taylor-Johnson) and Scarlet Witch (Elizabeth Olsen), whom the director claims were needed in this sequel, even before he made the first movie, while confirming that "hundreds of Ultrons" will appear in the Avengers' massive final battle.

"I knew before I made the first film that Ultron needed be in the second one, along with Scarlet Witch and Quicksilver as well. The way I approach a story is that I find these moments by thinking, 'You know what I need to see?' And generally if they work, you go from there. You know they're going to fight Ultron. You know Ultron has a tendency to build hundreds of Ultrons. So that's going to lead you in a certain direction, but the hard work of the thing is making sure everyone feels serviced and integrated. So, in the beginning it's fun. You're thinking, 'What would be fun, what would be cool?'"

These statements essentially confirm that the Comic-Con poster which featured all of the Avengers battling countless Ultron robots will actually be seen in the movie. The director added that his biggest task with the sequel is to give fans more insight into these characters.

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"The biggest thing for me [in 'Avengers: Age of Ultron'] is to go deeper with the characters. There are new characters, there are more characters, but the troupe I have from the first movie is so amazing that I want to get in their heads, and this movie is letting me do that in a way I couldn't in the first one. Now that people accept the reality where Thor, Iron Man and all these guys hang out, I can now bend that reality. I've got Quicksilver and I've got Scarlet Witch and they have very different ways of looking at the world, looking at The Avengers and different powers. So that visually and emotionally, we can go to a place that we didn't have access to the first time."

He also added that the sequel is largely an adventure film, but it also combines elements of action, western war, horror and woman's genres as well.

"To me, adventure film is the best way to put it. Then science fiction, action, western, war, woman's picture, horror movie. I'm not kidding; every single one of those things is in there."

The director added that Mark Ruffalo's Hulk and Scarlett Johansson's Black Widow, "have a great deal to do" in the film, while Mark Ruffalo teased that Bruce Banner may be "finding love at some point." You may recall there was a moment in the trailer where both Hulk and Black Widow had a moment, which some believe will lead to a Hulk/Widow romance. The director also teased that, since he built this superhero team in Marvel's The Avengers, Avengers: Age of Ultron will tear the team apart.

"The whole movie is a process of changing everything and keeping everything the same. You want to hit all the things that made people love the first movie, but you also want to make something new or why are you here. I don't want to make The Avengers again - I did that one time. With the ending it was important for me that we felt a progression. We didn't just feel, 'well, no problem, we cleaned that up!' because that's an episode of television. That's not a film. This film, there's more at stake and we take that seriously."