Joss Whedon is undoubtedly one of the brains behind Marvel Cinematic Universe (MCU). MCU owes a lot of its success to the visionary works of Whedon who helped in bringing several Marvel comic book characters on big screen.

Whether it be story or direction, Whedon has steered the franchise brilliantly from "The Avengers" to the highly successful Phase 2 movies.

However, despite all the success and praise received from fans across the world, Whedon has decided to part ways with Marvel, which has come as nothing less than a shock for all MCU fans.

CB has reported that in a recent Q&A session, Whedon revealed the real reason he was quitting MCU, and explained his current relationship with Marvel, stating he is no longer involved in creating any of the Marvel movies.

"I've gone off the reservation for a while. It was five years that I was working on either Avengers or S.H.I.E.L.D. That was an enormous gift they gave me; they handed me several hundreds of millions of dollars and said 'do what you do,' which is very rare and I was very lucky.

"At the same time, it's important for me not just to have my own thing and do something smaller, but also to create a new challenge for myself because I will start to repeat myself."

Even though Whedon didn't direct all the movies of Phase 2, he described his position as that of a "showrunner".

Jon Favreau, who directed first two "Iron Man" movies, produced the third one and stayed away from the creative crew. There is a possibility that Whedon too might choose not to be involved directly and produce the Phase 3 Marvel films.

Whedon publicly admitted he was exhausted during the production of "Avengers: Age of Ultron". Hence, he wants to take a break and have a relaxed life for a while.

Check out the complete Joss Whedon's Q&A session: