Those viral trailers were just trying to hype up the game as an intense survival horror experience, TC. In other words, Chris feared everything that had happened to him in Kijuju, implying that RE5 would be scary to us as well. (Seeing as those "flashbacks" were all gameplay clips from RE5).
Capcom was right about the "can't forget" part, but it wasn't "fear' I wasn't forgetting. You can't forget something that isn't there in the first place.
"You want knives? You want them in your belly? No? Then you stop talking to Deeja."
^ Yeah I remember that now. They were going to use the sun and the sun's heat as a gameplay element. Meaning if your out in the sun for to long, you overheat and start to hallucinate until you get back into the shade. Too bad they scraped it.
"Hey someone help bat baby up off the floor." The Joker in Batman Arkham Asylum