Care to make your predictions on the film? I don't mean to sound antagonistic, just curious.
Alright I'll give it a shot. Skip in case of any potential spoilers:
Firstly, I imagine the film will give an explanation as to where the queen's powers came from, either in the prologue or as a revelation towards the end.
In the beginning of the trailer, a prince is seen, and it seems like there's a ceremony going on. I think the sister Anna may be marrying the prince (or he may be marrying the queen), and something happens to where the queen loses her composure and accidentally reveals her powers during that ceremony (or after).
Then of course, she runs away and flees the kingdom, creating an ice world and ice critters to guard her and keep her company (mentions she's lonely in the beginning). Anna chases after her and meets (or is rescued by) the guy with his reindeer, and with his own motivations helps her find her sister. Having spent time with Anna throughout the journey, furthers the idea that the queen and prince are getting married, while Anna and this guy end up together instead.
Did the queen protect herself from those ships or were they already frozen and destroyed? It also appears that she ends up captured at the end and is talking with the prince, and the prince leads a charge against her at the end (though he slows the guards down). Why is she attacking them? Is she protecting something, or is the villain there? I think there are several possible scenarios for the antagonist:
1- the Prince is the villain
2- the Dukes are the villain
3- any combination of the above
4- there is no villain or the queen herself creates the antagonistic forces
5- the villain has yet to be revealed
Basically, something bad happens during an important moment and she flees the kingdom and creates her own ice world. Her sister looks for her with friends she finds on the way and at the same time the queen is being pursued by either the villain or is already captured. Since it's Disney, a happy ending would either be people embracing the snow or the snow melting and turning to summer. It's possible that Anna awakens to powers of her own to help her sister in the latter. This is also where the snowman would die (only to be revived later of course, because ballsy deaths don't happen anymore).
Of course I'm no expert and this could be completely wrong, so I'll ultimately have to watch it to see how it does. By the time I watch it I'll forget what happened in the trailer anyway.
Basically. Only thing that's missing is who the villain is.
