Care for some brainstorming?

Since many people are unhappy that WB used Doomsday and the Death of Superman arc too early, I'm curious what villain would you have featured in the movie and why?

My idea:

Villain: John Corben/Metallo (story changed to adjust to the lore established by Snyder)

Motivation: Lost family and severly injured in the battle of Metropolis (Cliché? Check)

Concept: Due to his failing health John accepts Lex's help. With the help of the recovered Kryptonian tech Luthor converts him intoMetallo. Working together with Luthor, using his new abilities John is commiting crimes to frame Superman, which draws the attention of Batman.

In the final battle Metallo is overpowering both Batman and Superman, (due to his tech and Kryptonite heart) til Wonder Woman shows up. As Supes & WW fight Metallo, Batman goes after Luthor who retreats to the Kryptonian scout ship. Batman finds him communicating with the Steppenwolf/Yuga Khan entity (*cough cough* reference)

Metallo dies, Lex gets busted and Supes lives. Batman learning of the existance of Darkseid, suggests the forming of the Justice League.

TLDR: Metallo

Batman. Or Superman.

After all the movie was called Batman vs Superman

I like that.

Parasite

He drains superman powers so Superman can know what its like to be human.

he gets his powers back half way through the movie with lois's help.