Before Jessie Eisenberg recieved the offer to play Lex Luthor in Batman v Superman: Dawn of Justice, he had an offer to play another character. Eisenberg declined and then Zack Snyder returned and offered him Lex Luthor. Snyder decliend to specify which role he initially offered Eisenberg but perhaps The Social Network actor was originally offered Scott McNairy's part? It's hard to imagine Eisenberg as The Caped Crusader. Or maybe Eisenberg was Snyder's first choice for the role that went to Ezra Miller, The Flash?
Also, if Snyder originally envisioned Eisenberg for a different part, does that mean he also initially had someone else in mind for the role of Lex? You can read his comments below.
"Let's call it a secret, but nevertheless it was the exact opposite of Lex Luthor. I feel like once [Eisenberg] found out who Lex was he embraced it. Once you kind of start digging into Lex, it's a bit of a scary thing to be that guy. I don't think he just goes 'Oh, I'll just be that guy and then when I go home I'm not him.' I think the thing with Jessie is he wasn't immune to the reality of playing a super-scary character."
Batman v Superman: Dawn of Justice arrives in North American theaters on March 25, 2016.