I don't personally have the guide, but that's what it says.
The disappointment really only gets worse if you've read anything about the 4chan leak or the NeoGAF thread.
There are a bunch of things that never made it into the game, whether due to time constraints or just simply scrapping parts of the story. King Regis was intended to be killed by his bodyguards in front of Noctis. Noctis was supposed to be responsible for Luna's death (I'm pretty sure it was an accident) causing Ravus to hate him. A bunch of things were left out of the final release, like Ardyn's "monster" form (him being the only villain in the entire FF series to not have one) and a dark Lestallum from the final chapter.
And all of that not even including the parts that we DID see that were cut from the trailer. The E3 2013 trailer, with a few scenes like Regis and Noctis eating dinner together, is almost completely cut from the final release. The Dawn trailer with Regis holding Noctis? Not in the game. And remember that one trailer with Noctis drinking coffee while camping under the moon saying "Almost there." ? Not in the game either. I'm pretty sure the moon was supposed to be a bigger point in the game. It's even the logo that they printed on the special FFXV PS4's. Yet it has absolutely zero significance.
All of these were what I expected the story to consist of. All of them would have made the story better. It's a damn shame what this game turned out to be.