User blog comment:Emuei/Original Sin Story: Complete Edition Booklet Translation/@comment-25932613-20150824004401/@comment-26160852-20150824031349

Beside Maria's virgin conception, there's other new information too, like Zvezda family's possible relation to Held, the implication that the 'twins' status of Levia and Behemo is not really what we think twins are, and all the info regarding the snake. The existence of a parallel univere is a big revelation imo.

Of course there can't be much in a 20-page booklet album. I feel like this album is just building up the expectation for new revelations in later light novels.