The trailer is about what I would expect. Bunch of heroes, highest stakes ever, two armies charging at each other, roll title screen.
I am sure this will be prety good because Marvel doesn't really make bad movies, although I am disappointed in how goofy Thanos looks, more like a big shaved ape gladiator than a being who is about to become the strongest in the world.
The other thing that I am a little bummed about already is the army scenes. It already looks like they are going to burn up some screen time convincing armies to join, rallying the troops, leading them into battle, while one or two of the main heroes does some last minute trickery to get the gauntlet from Thanos.
Or maybe I've just seen too many movies and I think I know everything.
Give it a watch, friends.