Lots of money shots in the trailer, all of which I loved, but my favourite was definitely the Lois/Superman interrogation. If you can even call it an interrogation
There's lots of reasons I like that scene - Lois's constant grin, Cavill's boyish smile and manner, his calm and friendly responses, the explanation of the 'S' on his chest. There's clearly chemistry between them and the whole exchange has a flirtatious vibe to it, which - when you think about it - is totally at odds with the reality of the situation (a reporter is interviewing an alien in some kind of military stronghold, whilst being tensely watched through a 2-way mirror by personnel). It's an interesting scene because they you could stick the two of them in a cafe dressed in normal clothes and the exchange would be just as relaxed; they are so invested in their interaction it's like they have forgotten where they are.
Cavill's demeanour is great here too. He's one of the most powerful beings in existence, but he couldn't be any more down to earth in that scene if he tried - which is 100% Superman to me; friendly, charming, no ego, and most importantly, likeable.