If it's not a demo, then why release a game under the same name this year and again next year? Not much sense right there. Fact of the matter, if the prologue version will be so massive, it might end up hurting the actual game in sales. Because we still don't really know what the differences will be between both games. Do we even know if there will be damage modeling? Last i heard, rather not.
Deep into the darkness pearing
Long i stood there
Wondering
Fearing
Doubting.