Season 1 has made Saitama a very popular anime character, and since little is known about his past, the number of episodes added to season 2 is believed to explore his origin.

The first season was made of 12 action-packed episodes, and though no official number has been announced for the second season yet, rumors have it that it will have at least 19. The first season has introduced a lot of friends and foes the main protagonist has met and encountered since he discovered his super strength as a kid. What was not explored, however, was the reason for his strong punch that is the central story of "One Punch Man." Could it be hereditary? Caused by genetic mutation, perhaps? Or is it simply a unique ability?

He is known to easily forget people's faces and names, which could lead a story arc of events that will make him remember his past.

Speculations regarding the enemies he will be facing continue to dominate anime conversations as well. The manga series where the show is closely based upon is leading to a great fight between Saitama and a very powerful villain named Garou.

Garou is known to be arrogant, proud, and vindictive, but unlike most villains, he tries not to kill heroes. There were moments in the first season where he seemed to be swayed to the good side only to be won over by his inner demons. Monster Association has set its eyes on him, which makes him a natural candidate for Saitama's biggest fight.

However, the biggest villain in the next season is said to be an unlikely enemy. The main villain, talks say, would be a good-looking fighter named Amai Mask. Like Saitama, he is fully human. He is said to be among the Hero Association who can barely make it up to the ranks but will eventually be as strong as, or even stronger than, Garou and be Saitama's biggest match.

"One Punch Man" season 2 is believed to have started production and is rumored to be released in the last quarter this year.