As of today (Sept. 6, 2014) we still don't know whether Luthor will be bald (as he's always depicted in the comics) or if director Zack Snyder plans to change the villain's look for the movie.
So, when the Tweet below appeared a couple of days ago it got the Luthor hair rumors started again. In the pic it appears as though Eisenberg is wearing a wig, which seems to support the "bald Luthor" theory.
Take a look at the pic (courtesy of Nicole Yioupis) and let me know what you think.
just met jesse eisenberg from the social network and had a conversation with him cool 💯 pic.twitter.com/6n12xuZNDE
— nicole yioupis (@nyioupis) September 4, 2014