Alternate reality (Final Fantasy 15)

In General, revising a million times a game trailer, I came to stupid and sgsnemu opinion
I think that what is shown in this trailer this is the original story of the game
The whole game is just alternative history and what could be
In fact, all friends Noctis just don't exist, the whole story is different
All the things that we showed in the game is just one of the realities in this universe
Namely, the trailer, this is what was supposed to be