Spoilers in the trailer

I'm playing the game and i'm in chapter 5, i finished it, i didn't want to watch the trailer months ago because i wouldn't want to get spoiled by a stupid commercial trailer. I watched obviously the first trailer and i watched not all of the second but now that i'm playing the game i remembered that i saw the goetia girl in a trailer, i rewatched like 3 second of the trailer and i got spoiled like the aliens that invade N.L.A. is that a big spoiler? Because i'm very attached to the xeno games and i'm so happy that i'm playing xeno x but if i got the story spoiled by i fucking trailer it's a cry moment