Just imagine the MCU's Iron Man, infusing Luthor's cold, calculating demeanor with his trademark theatrics and flair, transforming the arch-nemesis of Superman into a figure that is both dangerously genius and unexpectedly human.

Source: https://screenrant.com/robert-downey-jr-superman-movie-canceled/

Lex Luthor's deep-seated hatred of Superman stems from his misguided belief that he himself is the ultimate hero and Superman is a threat to his rightful destiny.

Source: https://collider.com/nicholas-hoult-lex-luthor-superman-legacy/

Lex Luthor's previous movie adaptations have failed to capture his complexity and nuance, portraying him as a one-dimensional villain or a maniacal mastermind.

Source: https://collider.com/nicholas-hoult-lex-luthor-superman-legacy/

Of course, it would bring out Luthor's arrogance and selfishness and use them to take control.

Source: https://www.cbr.com/dc-heroes-villains-carnage-alien-symbiote-host-best-matches/

Unless Two-Face gets a bunch of Lex Luthor's Kryptonite weapons, he should never battle Supergirl.

Source: https://www.cbr.com/dc-villains-should-never-fight-supergirl/