"[We] shuttle between the different movies and make sure that finally we're mimicking that comic book structure where all of these movies are connected. . . I'm pushing them to do as many animatics as possible to animate the movie, to draw boards so that we're all working off the same visual ideas. But the exigencies of production take first priority."

"There was a very Wasp-y draft that I wrote - but it was way too Wasp-y. Because I was like, ‘She adorable! I’m just going to write her!’"

"You need to separate the characters from their support systems in order to create the isolation you need for a team."

"I said [to Joss Whedon] I need to be in the opening sequence, Tony needs to drive this thing. He was like, okay, let's try that. We tried it... and it didn't work, because this is a different sort of thing, everybody is just an arm of the octopus."

"Robert is extremely hands-on. One of the first things he said is, ‘I will never mess with your intent. I will question every day how you plan to get there. But I will never mess with what you’re trying to accomplish.’ We had to sniff each other out. Because I’m used to having people do everything I say, and so is he. What we found was, one of my favorite collaborations that I’ve ever had."

"We have made the decision to not bring Ed Norton back to portray the title role of Bruce Banner in The Avengers... Our decision is definitely not one based on monetary factors, but instead rooted in the need for an actor who embodies the creativity and collaborative spirit of our other talented cast members."

"If I had done nothing else the last two years [of production], and done only that scene of Hulk throwing around Loki, it would be enough. I fought hard for that sequence because I believed it would be the best thing ever."

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1. Marvel first announced they were planning on making an Avengers movie in April 2005, but it wasn't until June 2007 when screenwriter Zak Penn (who wrote 2008s The Incredible Hulk ) was bought in to pen the script. Two years later, an excited Penn spoke about his draft script:However, when Joss Whedon was being wooed to direct the movie, Marvel's Kevin Feige gave him Penn's script. Whedon's response was that he felt the studio didn't "have anything" and they should "pretend this draft never happened"!Whedon then submitted his own five page treatment of his plan for the film, under the title "Avengers: Some Assembly Required". Feige loved it, and offered him the job as writer/director stipulating that he must include the Avengers against Loki, a battle among the heroes in the middle, a battle against the villains at the end, and he get the movie done for its May 2012 release.It should be noted that Zak Penn still received a writers credit for the movie.2. Joss Whedon's first draft included both Ant-Man (aka Scott Lang) and the Wasp (aka Janet van Dyne), as he intended to introduce both characters to the MCU at this stage. Marvel felt differently, not wanting Ant-Man included at that time, but it was Whedon who was the one responsible for nixing Wasp from the script.Ultimately he cut the Wasp out to make more room for Black Widow.3. Originally Joss Whedon had not intended to include any supporting characters from the heroes' individual films, outside of Loki. His reasoning was:However, Robert Downey Jr didn't feel the same way. He insisted Pepper Potts (Gwyneth Paltrow) be in the film, as Downey Jr wanted to progress the story from where she and Tony Stark had been in the first two Iron Man films. Whedon relented, and then went on to include Paul Bettany as the voice of Jarvis, and Stellan Skarsgård as Selvig. Natalie Portman was also written in to cameo as Jane Foster, but when she became pregnant she dropped out of the production.4. Bringing Pepper in was not the only demand Downey Jr had, as he himself revealed:But eventually the pair got on very well, and of working with Robert Downey Jr, Whedon said:6. Edward Norton was set to return as Bruce Banner but negotiations with Marvel broke down. Kevin Feige released a statement saying:Ouch! Norton's agent Brian Swardstrom felt Feige's statement was "purposefully misleading" and an "inappropriate attempt to paint our client in a negative light".But before Mark Ruffalo signed on to play Bruce Banner/Hulk, Joaquin Phoenix was considered to play the temperamental doctor.6. Morena Baccarin, Jessica Lucas, Lindsay Lohan, Amanda Peet and Mary Elizabeth Winstead all screen tested for the role of Agent Maria Hill, before Cobie Smulders was eventually cast.7. Although Marvel would eventually strike a deal with Sony to bring Spider-Man into their cinematic universe, there should've been a small nod to the web-slinger in The Avengers.The rights were secured to feature OsCorp Tower from The Amazing Spider-Man. Unfortunately the legal wrangling took so long that by the time it was settled the digital rendering of the skyline was already complete and it was too late to incorporate it.8. Ever wondered what Joss Whedon's favourite scene from The Avengers is? It's the 'Puny God Scene', as he described:And it's hard to argue with that...9. An entirely different post-credits sequence was planned with a cameo from Don Cheadle as Lt. Colonel James 'Rhodey' Rhodes. He was to turn up wearing his armor only to find out that he had arrived too late for the battle.10. When completed Marvel had to submit The Avengers for certification three time to be granted a PG-13 certificate. Initially they were advised the movie would be given an R rating because of Agent Coulson's death scene, as originally it was much more graphic with Loki's staff seen bursting through his chest followed by a much longer held shot on Coulson dying. Despite two attempts at trimming the scene the MPAA were still not happy, so instead, a gruesome sound effect was added after Loki appears behind him, and then a quick-cut to Thor's reaction.