You know, I was just going to post this long attempt at justifying how the Clark/Lois/Supes triangle could work in this film... but I think i've let go of that one.
It's just that last scene in the trailer... it's making it impossible for the triangle to work.
Let me explain why (excuse me if any of this sounds incredibly girly).
In LnC and other incarnations, the reason it's almost plausible that she doesn't even look twice at Clark, is that she's swept up in the magic of this unattainable, alien superhero almost like a fan to a celebrity. And while she does actually develop strong feelings for him, because he is pretty much the perfect man (heroic, protective, kind, caring, passionate etc) and any girl would... she doesn't actually know him at all. She's just got this idea of him, and that idea is pretty much a lie. He makes sure to be very very private when in Superman guise, and not let on that he might actually have a human personality.
With Clark, because he's got such a full human personality, because he's got parents and a childhood and friends... she simply wouldn't ever think of putting the two together. It'd be sort of illogical.
Now, I grew up on that dynamic, and i've loved it for a long time.
But just looking at the obvious connection they have in that scene... that's not a school girl crush. That's not a cheesy, swept of her feet romance. That's two people who care about each other a lot... and it sort of says to me that they've been through something together beforehand. That perhaps she does know him a little better than any Lois has ever known any Superman this early on before.
And because of that, i'd find it hard to see how she wouldn't immediately see straight through such a flimsey disguise, when she's pretty much staring into his soul in that moment
Plus, i'm pretty sure that last 'what do you think' line is directed at Lois... so if he's talking to her about his father being afraid people wouldn't accept him, he's talking openly about his relationship with Jonathon Kent.