Will in the meantime Raven will actually sign the real stoybook of legends and will thy eventually get together with Dexter?

You really need to watch the"Way Too Wonderland"special.This special gave an end to the "royal or rebel"struggle.(I won't say anything more because I don't want to put any spoilers)
As for Raven and Dexter they already dated each other in the episode"Date Night".

Raven does sign the book but using what I know Raven and Dexter are not a thimg.