The Elemental trailer felt kinda dead to me. Between the horrendous voice-over, the lack of real emotion, and static imagery it just fails for me. You need to excite people - they are about to lead armies crusading across the land conquering their foes. Setting up trading empires, and conducting deep comprehensive diplomacy. Sending Heroes out in search of lost treasures, and gathering groups of adventurers out to raid lost tombs. You are the very symbol of your nation. If you should fall, your empire will crumble. These are very epic themes. The game needs to have an intro that really portrays that.
For a trailer, yes, you're right.
But not for an intro. It doesn't have to show everything you have in the game.
And I love that teaser (but the voice), I love the way lines blend into the pictures (even if it isn't perfect, some pictures start moving before the lines are finished being drawn)
The only thing I didn't like is the voice : I can't say what is lacking, but I wasn't thrilled by what she said. The text is just too "generic" and the player don't feel involved. The best intro let the player imagine he was one of the characters on screen, or some things that would let him think he was part of what he is watching.
PS: But if you ask me, I would kill to get an intro like "once upon a time", with the hiergamenon closed, an old hand opens it, you hear some cracks and an old voice, that seems coming from another plane of existence, starts speaking about what were, what is, and what will be. Some sparkles around his hand or around the hiergamenon. And why not a "living" book ? I don't now about that lore-wise, but it would add some "magic" to something that just seems "learn fireball, throw it at your enemies, win".