Cast Members Robert Downey Jr. (R) And Chris Evans Pose At A Press Line
IN PHOTO: Cast members Robert Downey Jr. (R) and Chris Evans pose at a press line for "Avengers: Age of Ultron" during the 2014 Comic-Con International Convention in San Diego, California July 26, 2014. Reuters/Mario Anzuoni

"Avengers: Age of Ultron" may reportedly be the best Marvel movie ever, according to Robert Downey Jr. The actor had high praises for the movie and said in his recent interview that the "Avengers" sequel has a lot of surprises in store.

"This new Avengers may well be the best Marvel movie, and, by the way, that's saying a lot, because I thought Guardians of the Galaxy was great," said Downey Jr to Comic Book. "Iron Man 3 turned out great, and Cap 2 was awesome. And there'll be some surprises in the next little while too."

"Avengers 2" is about an evil robot, Ultron, mistakenly devised by Tony Stark (Rober Downey Jr). Ultron would go on an operation to destroy earth and the Avengers would try to stop him. It has also been further reported that due to Tony Stark's mistake of devising evil Ultron, the Avengers would go against him and may split into two parties. Pictures of Hulk fighting the Iron Man have already surfaced, and it has been further speculated that other Avengers would also go head-to-head with Iron Man, according to Movie Pilot.

Meanwhile, there is another star who has great things to say about "Avengers: Age of Ultron." Jeremy Renner, who plays Hawkeye in the film, also said that the sequel is being made at a "bigger" and "better" scale.

"I think that everything that worked in the first one is exponentially going to be better in this one. I think the comedic relief, I think the action, and it's going to be bigger," said Renner to Comic Book. He also said that the Avengers would spend more time together in the "Avengers 2," which would be real fun to watch. Furthermore, there are a slew of secrets that would be revealed in the sequel, according to the Web site.

"Avengers: Age of Ultron" is slated for release on May 1, 2015. The cast of the film includes Robert Downey Jr, Chris Evans, Mark Ruffalo, Jeremy Renner, Chris Hemsworth, Scarlett Johansson and more.