Lex Luthor will be seen in his warsuit, which was built on Apokolips, giving him super strength, flight and even a force field, which put Lex on an even playing field with Superman.
My opinion is that if you're making a movie with DC superheroes in it, it'll be great adding villains as well besides typical arch-rivals. Other heroes hopefully in the game will be Captain Marvel, Tim Drake, and Jason Todd (Red Hood).
God Bless and Play Hard Gamers!