I like dogwelder9’s idea. In every Oreo ad of the last few decades, it’s J’onn J’onnz.
If he loses an audition, he just shows up on set, goes up to who beat him out, pulls a Martian deal like (to quote the song Intergalactic by the Beastie Boys) “a pinch in the neck from Mr. Spock!” and presto chango, gets the gig afterall.
He’s known for accepting cases of Oreos in lieu of money as payment for his work.