I don't want:
1) A supes/Lois romance that feels perfunctory. If it's just there to fill the seemingly mandated "kissyface" quotient and endowed with the depth of a kiddy-pool in July, I'd rather forgo it. Make it interesting and heart-warming instead.
2) Overly-jerky batman. I don't mind him having an stand-offish attitude and sporting scars from his past that manifest in various ways. I don't even mind him doing some questionable things to supes if he thinks it necessary, but please don't make him some irredeemable psycho. I hope they show the duality of his nature (meaning he is tender to those he protects and not so with those he opposes).
3) "JL Begins." I'm aware that it's possible to "world-build" and have a decent self-sufficient story. I hoping for that, but I fear this movie feeling like little more than a JL commercial featuring a little of everyone and not enough of anyone.
4) A Superman who never learns: I was not bothered by MOS's less-perfect superman, but sooner or later one realizes that the superman character is a paragon. He is wise, selfless, patient and strong in ways that few (if any) others are. I want to see him grow. I want to see him be someone looked upon in awe and not just because "he's kinda hot." MOS gave us his first foray into society and it wasn't a joyous occasion for some folks. Let him prove to people that his presence is a gift, not a pestilence.
5) Here's hoping Gal Gadot can act. She hasn't given a performance I enjoyed thus far. I hope that changes. I also hope WW doesn't feel shoehorned in or come off as an excuse to have a hot chick beat on things regardless of plot or reason.
6) "Cool" and pointless character fights. Many a person seemed to enjoy the Avengers' squabbling, but I did not. I thought it made them look petty and deflated any hope of tension. I'm not against character fights altogether; I just prefer they're raw and emotional in nature and have stakes involved. Cool-looking fights are fun. Cool-looking, meaningful fights that have a profound impact on the story are breath-taking and endlessly entertaining.
7) A mediocre script. Come on now, DC/WB. I know there's another Dark Knight in you somewhere.