To get that kind of initial buzz you need a trailer that actually sells the movie with that sense of scope and energy.
The Predator trailers are frankly... Low juice. Low energy. Here's a shot, there's a shot. No real sense of a direction or a focus.
Theme, focus, rising, pay off. Regardless of the movie behind them, in their times these trailers got the audiences excited. Asses in seats.
The Predator trailers are meandering clip shows that don't have a central drive or a sense of building/rising tension/energy. Here's this character, here's this explosion, Predator shot, character shot, predator shot.
Just look at that Prometheus trailer. How many people white knuckled their office chairs watching that and going "Holy shit the old man has pulled it off!"
The Mummy, taking a nod from it's old universal days has the trailer narrator invite you. Why? Because this is going to be a film you don't want to miss.
300? "This is going to be one wild night." That's such a meta line, speaking to the audience, again. You don't want to miss this. It's going to be an experience.
One last one, for the road, again from the sister franchise:
Again, it's a cohesive rising action. Starting ominous, shifting to marshal atmosphere, rising tension, the choral cries, the motion tracker fading in, over lapping dialogue, rising still, motion tracker reaches pitch, overlapping dialogue turns to shouting, BAM, explosion still rising, until the reveal of the Queen Alien. ALIENS - This Time It's War. The tagline that's going to stick with you. It's all seamless end to end and it does not let the under current tension die from the start of the trailer to the end.
Though, I must admit a lot of my issues with The Predator trailer(s) are also issues I have with the way modern trailers are "generated."