Already, before its Cairo premiere next Wednesday, Bab Al-Shams (The Gate of the Sun), Yousry Nasrallah's magic realist retelling of the story of Palestinians, has generated a hubbub in the cultural sphere. Amina Elbendary talks to the director after reading the book and sneaking a coveted preview, while Mohamed El-Assyouti, fresh from a press screening, explores the theory behind this brand of history making