Personally, I'm hoping they don't show anything more from the campaign. I want tge "WOW Factor" to be just that. And I want to experience it furst hand, not through a video or another's gameplay.

: I think, for Halo 6, it would be important to invest more into the technology
: or invest more into fiddling with our emotions in order to wow gamers
: again. Imagine if E3 2015's presentation was actually Master Chief
: shooting up that building from Hunt the Truth. That grips our emotions.

No thinks. If by "technology" you mean graphical effects. I'm sick of graphics taking a president over gameplay and story. Halo 4 pulled on our emotions like no other, but everyone complained about it. Especially here. I loved it, myself. But due to the backlash they got from Halo4, don't expect 343i to go that route again.

: I'll never forget Halo 2's gameplay reveal, and how unreal it looked and
: played (unfortunately, a lot of that video was unreal, but it was a strong
: example). These days, a lot isn't surprising anymore unless it's a huge
: technological accomplishment (No Man's Sky), or if it strongly grips our
: emotions.

Halo2's reveal worked so well because it was the second game of the franchise. Being the 6th (basically the 7th) game in the franchise, there's very little that can be done to impress gamers. Clamber would have helped with the wow factor, but that was revealed over a year ago. The only possible wow factor I see to be done, is to have Dr. Halsey slap Master Chief or a Elite Zealot, and he do nothing but stand there or knell.