Ok,I can also say that the designs are not fake, the posters are obviously but the backgrounds are concept-arts.
The Rotoscopers are right about what they said and described but I think it would be better to not spoil the story girls !

I also know the story and all the visuals for months because I work for Publishing but if Disney took off the posters from Cine1 (despite it was too late), there's a reason!
Only Disney should have the right to publish what they decide to show to the public for the marketing campaign of Frozen.
Look at the Wreck-it Ralph posters, their textures are less good than in the movie itself and they are not always on-model, plus sometimes there are paint-over the CG charas for posters and promos (there were some on Tangled sometimes, and there are some on the Frozen leaked poses I think (especially on some hair parts).
Sure Anna looks like Rapunzel and Elsa is not what most of you expected because everyone has this picture of this regal mature and cold lady as the Snow Queen unconsciously, but both sisters are great characters and the overall story is good believe me.
Last but not least, it's a typical Disney movie okay so please stay patient until things will be revealed by Disney and stay confident if you are a fan of Disney and fairytales.
And about the "uninspired" designs, don't you think that Paperman's characters are so common to what use to do Disney? Don't you think that Elowny, Ariel and Belle have the same face design? Not to mention all the characters from Disney animated features which were reused from the 60s or the 90s...and what about the Ghibli's characters? They look all the very same, but the stories, music, settings are so moving all compiled that you must love the characters in the end.
With CG, it's a bit complex and the production is so tight, and nearly every big studio designs their human leading ladies with big eyes, or thin lips and small nose ( Cloudy with a chance of Meatballs, upcoming Epic etc...). After all, Disney has its own style and Ariel and Rapunzel are some of the most popularized heroines in the heart of children and adults, so I don't have a problem with that even if I got your first negative feelings.
I'm pretty sure you'll love those sisters at the end of the year.
