Hi. May I say something about your project? I understand what you´re talking about, but think of this, there are a lot, really a lot of history slideshows like yours, I don´t know your 30 other rejected projects, but this in particular is not outstanding enough in comparison with the huge amount of other history slideshows already approved. I´ve watched your portfolio and you have really great works, sometimes it´s just a matter of not giving up.
Keep working and good luck! Rejections are a common thing here that we all have to face, even for Elite authors