Fans love or hate the Batman movies released between 1989 and 1997, but even the harshest critics agree that discovering hidden details is interesting.

When Tim Burton released Batman in 1989, it forever changed the public's perception of this character, and it also completely changed the comic movie. In the following years, the release of the Batman movie received various praises and criticisms.

Related: 5 reasons why Batman '89 is the best Batman movie (and the 5 worst reasons)

Joel Schumacher took over directing the last two films, and this is when the film began to lose fans due to its ambitious nature. But even the harshest critics appreciate the attention to detail in all four films​​. Some of these details are obvious, but some other details are hidden things, and fans continue to lift the veil to this day.

One of the biggest revelations in "Batman" in 1989 was that a young clown actually killed Bruce's parents. Although Jack Nicholson played the Joker Crime Prince for most of the movie, Hugo Brick's role in flashbacks revealed this. Sharp-eyed viewers have noticed that Hugo appeared in an earlier part of the film through a facial photo.

Bruce is investigating the latest threat in Gotham City by viewing Napier's files. Although Nicholson's facial photo is in the front and center, on the side is a barely noticeable photo with a facial photo of a young Napier, which is obviously Blick. There are many strange facts surrounding actors playing clowns, but this is a fact that nobody cares about in the eyes of many people.

The last movie of the four-part series, "Batman and Robin" is either an underrated cult classic or an obnoxious movie, depending on who is asked. Regardless of personal opinions, many people agree that this movie is full of details, both good and bad. One of the things worth mentioning is the guest appearance of the Riddler and the Double-faced suit, who are the villains in the last movie "Batman Forever".

In the sequence showing the retrieval of the armor of Mr. Freeze, a room featuring the personal property of Arkham prisoner is shown, in which the complete armor is displayed. Although most people agree that this is a cool nod, many others think it's an opportunity to refer to other Batman villains, too.

It can be said that the greatest villain in Batman's Return is Max Shrek played by Christopher Walken. To many people, this name seems to be another stupid name that fits perfectly into the world of Tim Burton, but horror fans know this name from other places.

Max Shreck is named after the silent horror star Max Schreck, and his most famous role is in the silent thriller Nosferatu. It’s no secret that Burton cites this movie—a silent era horror movie that is still frightening—because old horror references are scattered throughout Burton’s films.

When fans hear the same words from Arnold Schwarzenegger and Batman, they may think of the portrayal of Mr. Frozen in Batman and Robin. What is less known is that he actually appeared in "Batman Returns," albeit in a photo. In Max's office, some photos hung on his wall, showing him passing by with many celebrities, one of which is Arnold.

Related: Arnold Schwarzenegger's six favorite movies (including science fiction)

Although this may only be a photo of Max and Arnold himself, a popular fan theory points out that this is actually a photo of Max with the famous scientist Victor Fries, who later became Mr. Freeze.

In order to make the citizens of Gotham City trust him, the clown held a parade and threw a large amount of cash at the crowd. Although he seems to keep his promise on the surface, many fans know that this is not the case. Although it is not so obvious in the final product, it is not real money.

Related: You completely forgot about 10 movies in which Jack Nicholson was involved

The script and even the manga adaptation reveal this, showing that the currency actually has the face of a clown as a callback to the earlier route. It’s no surprise to anyone that the clown would do such a thing, but on the surface it shows that the clown is just a good person trying to give back to the community.

When he first appeared in "Batman Forever", Edward Nigma showed an obsession with Bruce Wayne. So much that his rejection of his ideas was what prompted him to become a riddler. Even after adopting his new criminal role, Edward still seems to be an admirer of Wayne.

Related: Every real riddler (and how their version is different)

At a party showing his skills, Nigma appeared as Bruce, and even wore fake moles to match Val Kilmer's. Although this is not out of admiration for Gotham's favorite son, but out of resentment, it shows that he still has a high opinion of Bruce.

In the Batman movie directed by Joel Schumacher, one of the most annoying and notorious things is that adding nipples to the armor of Batman and Robin seems pointless. Although understandably despised, there may be a reference hidden in the eye. As we all know, the latter two films are more inclined to the rough nature of the Adam West series in the 1960s than the dark tones of the first two films. The nipples on the suit may be another subtle reference.

Adam West’s bat suit is more or less a simple shirt, and more than once, the actor’s nipples protrude under it. Although this does not explain why the armor has it, it can explain the reason behind adding them, even if it adds to the fact that Batman and Robin is one of the worst DC movies.

Tim Burton's first drama film is Pee Wei's Adventure. This film differs from his later work in tone, but it still makes Burton a tough guy. In the opening scene of Batman Return, various reunions took place. Tim Burton is standing behind the camera again, with Paul Ruben and Diane Salinger in front, who play Pee and Simone respectively in the big adventure.

Here, they portray the parents of Oswald Cobblepot, also known as Penguin. Interestingly, they were once the protagonists in a relaxed family movie, and here they gave birth to one of Tim Burton's best villains.

Although the public knows the name of Corto Maltese from the recent hit movie "Suicide Squad", fans of DC Comics know that the island has deep roots in the history of comics, and even made a cameo appearance in Batman in 1989. Although the island is a major plot point of "Suicide Squad", even if certain things are meaningless, this is a great movie, but its first mention on the big screen is more subtle.

According to reports, Vicki Vale took some disturbing pictures there that made her famous, and nothing more. Although it is small, it is interesting to see the progress of the island from the one-off line to the main plot point.

Bill Finger and Bob Kane are the creators of Batman, and one of them appeared as a character in the first movie. In the early days, Knox was the only person who truly believed in Batman and was mercilessly mocked for it. Once, a cartoonist told him that he had a telegram, but it was just a photo mocking him.

The cartoonist did not give his name, but a sign in the lower left corner tells fans everything they need to know. This photo has a famous autograph of Bob Kane, which means that he is a character in the movie, even if he is portrayed by an actor rather than himself.

Next post: 10 times DC's Batman is actually a villain

From movies to comics, from books to games, nothing can escape Downey’s nerd knowledge. Although his expertise lies in horror movies, he likes various types of movies. As long as he can hold a pencil, he has been writing and studying movies for longer. Although he can criticize with the best of them, he prefers to look at things in a more positive light.