Robert Downey Jr. let fans know that a charity drive will result in a lucky fan being flown to Los Angeles for the premiere of "Avengers: Age of Ultron."

Tuesday, he told fans to be prepared for a Wednesday night premiere of the final trailer for the upcoming movie.

It seems like fans could not wait that long. All morning they were on Twitter demanding to see the new trailer. They tweeted the hashtag #AvengersAssemble, hoping to "unlock" the early release of the trailer. It worked, the trailer is now available to be screened on YouTube, according to Forbes.

Originally the trailer was set to be shown during Wednesday's showing of "American Crime" on ABC. It probably would have given the show and network a great ratings boost. It still will probably be shown, but most die-hard Avengers fans have probably already seen it already.

The trailer manages not to give too much away, even though it is one of a few trailers for a movie that still does not come out until May 1.

Avengers fans can expect to see a battle between Hulk and Iron Man, but this will not be the ending of the movie.

A quick peak at The Vision will occur in the movie, hinting that there could very well be a third Avengers flick.

In the trailer, a romance between Mark Ruffalo and Scarlett Johansson is hinted, so look for those two to get close to each other in the movie. Johansson plays Black Widow and Natasha Romanoff, and Ruffalo plays The Hulk and Bruce Banner.

In a little less than two months, more TV spots and marketing will occur for the movie. Expect Marvel to keep any big secrets away from advertisements and try to keep the plots and twists of the money under wraps. 

"Avengers: Age of Ultron" stars Downey Jr. as Iron Man, Chris Evans as Captain America and Jeremy Renner as Hawkeye.