There’s nothing more interesting in comics than seeing big changes in characters. Be it a costume change, a personality change, or a new backstory - any shift in the status quo is sure to get people talking.
None of these changes do this sort of thing better than villains shifting their allegiances to the side of justice. It’s an age-old story, but one that gets no less compelling, however many times it’s told. The element of unpredictability plays a fair role in this, as the one thing that’s almost impossible to predict is when and how a villain will become a hero, and how long this will last.
More importantly, not only does seeing do-gooding villains make us believe that anyone is capable of good, it also reminds us that anyone can do good – and that as much of a cynical jerk you consider yourself to be, there’s still the ability to be kind and helpful tucked away in you.
If there’s one thing you can take away from this, it’s that if Lex Luthor can do good things, you can too.