If you are part of the My Hero Academia fandom, you will know about this theory given its sheer popularity. Fans have been convinced for a long time that Dabi is really the eldest Todoroki child ...

And now I get to kill you after all.” The Dabi vs. Shoto battle is something that My Hero Academia fans have been waiting years for, ever since the Dabi-Todoroki theory first became popular.

Likewise, the question becomes whether or not the Todoroki family can save Dabi without Shoto present, based on what’s known and said of their powers throughout the series prior.

The Todoroki family recounted their past mistakes, especially regarding Touya and decided to take responsibility for what happened to him. Thus, the family rallied behind Enji's goal of stopping Dabi.