It's a teaser in the sense that the movie JUST wrapped and the FX aren't complete yet, which is why Singer stated previously that the teaser would be "character focused". I'd wait until we get the FULL trailer to start making full on opinions of what the movie is going to be, I mean hell they even used an old ass Han Zimmerman score from Inception (shyt STILL sounds epic though, you could splice that music with a cut of a guy eating a plate of grits and the shyt would feel grandiose)
Dude doesn't realize that it's not the length of the trailer but the content that makes it a teaser.