We can tell that Marvel Entertainment was really pissed when they found out that the "Avengers 2" trailer was leaked online. A few days after the producers made an announcement on Facebook and other social media sites that the "Age of Ultron" will debut on Oct. 28, the trailer started circulating on the internet.

When Marvel found out, all they can do is to write on Twitter: "Dammit, Hydra". They also released a better quality video of the "Avengers 2" trailer, which was leaked online. On the day of the trailer launch, fans got a special treat and that is the missing scene in the footage.

There we can see the superheroes hanging out and trying to lift Thor's hammer when suddenly a party pooper arrived - and that is the new villain Ultron. Thankfully, that scene wasn't leaked online so Marvel fans were able to see something new during its release date.

If you think that Marvel have forgiven the one who did that, then think again. New reports reveal that they are hunting for the person responsible for the leaked video. According to the Hollywood Reporter, "The entertainment company says in court documents that someone using the name John Gazelle posted a file of the film on a Google Drive account."

The website also reported, "On Oct. 22, a lawyer at Marvel parent Disney sent Google a takedown notice pursuant to the Digital Millennium Copyright Act, requesting that Google expeditiously remove the file." I guess Google didn't take down the clip that's why "The Avengers: Age of Ultron" trailer got leaked online.

So who is John Gazelle? The only way we can find out is once they have traced the IP address that is associated with this person's Google+ and YouTube accounts. Apart from the trailer, the alleged infringer also posted a clip of Steve Rogers (Chris Evans) and Tony Stark (Robert Downey Jr.)'s scene.

Let's hope that Marvel Entertainment catches the person who is responsible for having the "Avengers 2" trailer leaked online. We don't want them to have the same fate as that of the "X-Men: Origins - Wolverine" wherein its full-length feature was leaked online weeks before its release date.