I think they should put Sid Sharp in the show, he only appeared once in Justice League Action. In this franchise, Sid is a fourteen-year-old boy who is the poster child for mischief and chaos and hates Anthony Ivo for stealing ideas for inventions his father Quincy Sharp came up with. He is also a huge fan of Superman and wants to be a hero just like him.

Later in the series, he is revealed to have metahuman abilities that involve technology, and it is soon revealed that his powers are of another world, the world of New Genesis. Sid is met by the New Gods, mainly the Forever People who explain that he is a cybernetic vessel for Metron's most powerful weapon, Infinity Man.

Sid is also later revealed to have a polar opposite (a brother per say) named Mobius, also called the Anti-Monitor (who was also created by Metron) who's sole purpose is to be better than him and to destroy everything he holds dear.