1. Just a dream
There is a theory that the entire One-Punch Man series is just a dream of Saitama.
It sounds quite far-fetched but think about it, the fact that everyone around Saitama constantly underestimates him could be a hint to how he is treated in `real life`.
2. Saitama and God
There are two fan theories regarding the concept of god.
First, Saitama has eliminated the limitations of a normal human (as he exists in the series).
Second, Saitama has the power of a god.
3. The prophecy refers to Saitama
In One-Punch Man, the prophet delivered a prophecy foretelling a mass uprising of monsters that completely overwhelmed the world’s superheroes, wiping out humanity within six months.
Well, some fans think that Saitama is the serious danger that the prophecy is talking about.
4. Saitama is Blast
Everyone knows who Blast is.
Although this theory also faces many disagreements, saying that Saitama and Blast are two completely different people, it is still worth considering, right?
5. Blast is Saitama’s father
Some people speculate that Blast is Saitama’s father, as Blast in a flashback scene looks like a young man.
Let’s assume that Blast is Saitama’s father and that he gave birth to him at the age of 25. Blast could have been 32 years old at the time of the flashback.
6. Saitama eats monsters
As we know, eating monster meat will turn a person into a monster.
In the flashback of Saitama’s character, he looks very different from now.
7. Saitama turns into a monster
This theory is probably not something many people expect to come true because the problem raised is that Saitama will eventually turn evil and become the villain of the series.
Currently, Saitama has begun to feel bored with his strength, as well as no longer interested in the challenges he faces.