Spike Chunsoft are not letting the creative obstacles posed by an unbeatable anime hero stop them in creating a balance fighting game. Therefore, they are introducing a Dream Version of Saitama in One Punch Man: A Hero Nobody Knows.
Seeing SSB Goku beaten down by Yamcha inevitably takes away from both characters and their former representations in various media. However, for a fighting game to be balanced, this outcome has to happen from time to time and therefore creates a conundrum for developers who want to stay true to the original depictions of certain heroes.
In the example of Arc System Works and Dragon Ball FighterZ, the developers simply forewent faithful character depiction in favour balance while letting gameplay and art style pull the players in. Spike Chunsoft, on the other hand, are going out of their way to preserve Saitama's unbeatable image.
First, they introduced the hero arrival system. Since fights in One Punch Man: A Hero Nobody Knows will be in 3v3 format, picking Saitama will result in the overpowered character being late but once he arrives, it's curtain call for the opposition.
The developers didn't stop there either. The latest trailer shows the Dream Version of Saitama where he is wearing pyjamas. In this version, his power is not outrageously superior to that of any other being in the universe. Instead, this is the balanced version of Saitama. The trailer also shows the hero waking up from a dream, which seems perfectly fitting and properly describes the reason why he didn't beat his opponents in one punch each.
Therefore, players will be present with an option to play as Saitama on level terms with the enemies but Spike Chunsoft didn't have to give up the character fidelity. Kudos. One Punch Man: A Hero Nobody Knows will launch on 28 February 2020.