The teaser is very good, but, imo, there is many things wrong it´s not even funny.
First of all...
Hogun the Grim looks painfully awful.
You can talk about where is his Mongol helmet, but more important and more iconic, where is his moustache.
And, what kind of a mace is that?
It looks like one of the Ice Giant´s balls on a stick
Second, the story looks...meh
Why does Thor have an australian accent when he arrives to earth?
His first line "This is Earth, isn´t it?" is a nice to take away the drama in a quick motion, just like ripping off a bandage.
Don´t this guys know how to write a script anymore?
And where is Donald Blake?
I know that they already said there will a mention to him, but, how are they going to do it without looking fairly stupid?
I´m sure i know, Thor will be called Donald Blake while on earth
All in all, from what i see in the teaser it didn´t changed my mind, it might be a reat movie but it misses the chance to be something powerful