Multiple sources have pointed out that Peter is not an atheist. This includes Amazing Spider-Man #500, Infinity Crusade #1, Amazing Spider-Man Vol 2 #46, Peter Parker: Spider-Man Vol 2 #48, Amazing Spider-Man Vol 2 #53, and more.
It was only later that Peter Parker's upbringing would become identifiable as Christian, and eventually be classifiable as a sort of generic Protestantism. At the time of Spider-Man's creation, most comic book super-heroes were created based on a generic White Anglo-Saxon Protestant character type.
Bruce Wayne / Batman (DC Comic) is an atheist. consider the fact he punched Darkseid (who is the God of Evil) and routinely dress as a bat and punch people in the dark.
“I happen to have a personal conviction, for many reasons, that Peter B. Parker is likely Jewish,” co-director Rodney Rothman told Riesman. “Personally, I grew up in Forest Hills, Queens”— Parker's neighborhood—“and I'm Jewish, so maybe I'm just projecting.”
Yes, Tony Stark has said a couple of times in the comics that he doesn't believe in God. In Stark Dismantled he says he "never took the trouble to believe in God" (Unfortunately I couldn't find an image of that part of the comic, but here I leave another comic vignette where he says he doesn't believe in Him).
14 Things the Misguided Religious Establishment Doesn't Want You to Know
What is Superman's religion?
Despite both of his creators being Jewish, Superman was raised Christian by his parents, the Kents. However, despite this he doesn't believe in the exact strictures of the religion. Based on everything that he has encountered in his heroic career, Superman does believe in some sort of God or higher power.
Bruce Wayne is usually portrayed as Episcopalian (including in comics by writer and Quora member Elliot S Maggin), although some writers such as Frank Miller have portrayed him as Catholic.
Spider-Man continues to resonate with each new generation because, just as with the Gospel challenge of Christ, we are all called, despite our faults and flaws, to be bringers of the good—to practice great love, coupled with great responsibility.
The Spider Society and numerous cultures of Earth-616 worship the Spider-Totems as gods. According to Ezekiel Sims and the Ashanti tribe in Ghana, the Great Weaver is Kwaku Anansi, who was the first Spider-Man.
Scientific aptitude and knowledge. Apart from his physical abilities, Peter is an intellectually-gifted scientific teen genius and has a prodigious aptitude in the physical sciences, with a high IQ level of around 250.
Like its predecessor, SPIDER-MAN 2 has a very strong Christian worldview. Although God, Jesus Christ, and the Bible are not specifically mentioned in the dialogue, the story wraps its theme of self-sacrifice and heroism in explicit visual Christian metaphors.
Atheism. As societies move on and learn they develop scientific practices and create a new social faction, known as the "scientists". Scientists study the universe around them, using evidence rather than mere belief. Over time the society drops various outdated ritual acts and beliefs.
Parker has exhibited a clear belief in God from time to time, and his Protestant Christian background has always been strongly manifest in his behavior and personal code of ethics.
The One Above All is the true creator and God of all things within Marvel. The infinite multiverses, dimensions, realities, and all of its concepts and life were created by The One Above All.
Jesus meant that the foundation of the Church was to be this faith. Peter himself is like the first rock in God's building. Jesus is the foundation and God's building is the Church. Peter was the first person to declare that he believed in Jesus and he became an important leader and teacher in the early Church.
This is the big one. Ethyl chloride is essentially Spider-Man's Kryptonite and it renders anyone's spider-powers null and void. This makes ethyl chloride extremely powerful against Spider-Man, but this chemical cocktail doesn't have nearly the same reputation as Superman's Kryptonite.
The Comics Bulletin website posed the question "Is Batman Gay?" to their staff and various comic book professionals. Writer Alan Grant has stated: "The Batman I wrote for 13 years isn't gay.
Over the many decades since the creation of Batman, in the comics there has been no definitive mention of Batman's religious affiliations which can probably attributed to the fear of offending the sensitivities of conservative or atheist fans.
Wonder Woman is not a Christian. She is a member of a female warrior race called Amazons, living on an island far from civilization called Themyscira. They worship and are closely acquainted with the Greek Gods of Olympus, and Wonder Woman herself was created by Zeus.
Superman has accomplished some amazing things, but one of the greatest is the fact that he's been able to triumph over Darkseid. Darkseid is the God of Evil and the lord of Apokolips. He's led his forces in a war against the New Gods of New Genesis for ages and has attacked the Earth many times.
In some cases, heroes even meet their gods during their adventures. While there are many obvious examples of religious superheroes, like Daredevil and Nightcrawler, there are other heroes who aren't as obvious about their beliefs.
