The massive leak, and then subsequent reveal, of the first trailer for Marvel's Avengers: Age of Ultron had fans going nuts in anticipation of the next team-up of the studio's biggest heroes and a new villain that could pose the biggest threat yet. But the trailer only showed so much, leaving some questions unanswered.

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1) What was wrong with Bruce Banner?

During the trailer, we catch a glimpse of Banner (Mark Ruffalo) cradled in a blanket as the other heroes are around him in the ship. Does something happen to the Hulk? Many rumors that have swirled around the movie say that the Hulk may go rogue at some point during the film, which is also hinted at in the trailer when Iron Man enters the Hulkbuster armor to take on the green giant. Will the Hulk be a bad guy in this movie?

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2) Is Andy Serkis' character teasing a Black Panther movie?

The trailer had a brief image of Andy Serkis, who has said that he came on to help with motion-capture work on the movie, but also said that he would be playing a small part in the film. The actor could be playing Ulysses Klaw, a villain from the Black Panther comics. Does this mean he will be in the movie also?

3) What did Tony Stark do to anger Thor?

At one moment in the trailer, Thor (Chris Hemsworth) busts in and picks up Tony Stark (Robert Downey Jr.) by the throat. While they seemed to get along in the last movie, what could Tony have done to make the God of Thunder so mad? Does this movie actually start the Civil War plot and begin to tear apart the group? It seems like Tony's actions may do that.

4) Why are Quicksilver and Scarlet Witch with Ultron?

In a short glimpse, there is an image of Ultron (James Spader) looking back at the two twins, Quicksilver (Aaron Taylor-Johnson) and Scarlet Witch (Elizabeth Olsen). Are they working for the villain or is he the one who breaks them out of the prison we saw at the end of Captain America 2? This could be the means to how they get tied up with The Avengers.

5) Is Thor going to change?

Hemsworth appears a lot during the trailer and it looks like the God of Thunder will have a lot on his plate moving forward. Not only is he threatening Stark, but he also is dropping Mjolnir and yelling shirtless in water. Is Thor about to go through a major change prior to his third solo film?

Avengers: Age of Ultron comes out on May 1, 2015.