My guess is he'll probably less powerful then his comic book counterpart.

from the look of the trailer i say yes

yes, i think he will be a bit weaker but he can grow in power in future movies.

" he wll be so much weaker "

Also do you think we'll get to see him fly in the movie?

Yes. The movie versions have all been weaker or less skilled than their comic counterparts.

I wonder if he's gonna lift the Midgard Serpent in his movie.

"yes, i think he will be a bit weaker but he can grow in power in future movies. "

Yeah he undoubtedly will be weaker in the movie. I just hope he isn't significantly weaker though, or displayed as having difficulty lifting something or performing some feat he would have extreme ease of doing in the comics. I hope we do get to see him show a few impressive feats of strength and wield a lot of power/magic/lightning across the screen. 
 
I'm just a little worried that Thor will be shown struggling or a lot weaker than he should be. I doubt this will be the case, as I think Branagh really knows and loves the character, so I think they will do him enough justice power wise. But as a fan, I'm allowed to worry.
 
Idk, it's just a really important part to his character. But as gambit and Irish said, I'm sure we will see his power level grow across the inevitable Thor franchise.

His level of power will probably be similar to that of the early Journey into Mystery issues, which actually makes sense.

Well, 3 Avengers movies are set to made in the future, and undoubtably more than 1 Thor films. He definitely has room to grow.

movie versions are always weaker than the comic versions, for instance movie Magneto isn't anywhere near his comic counterpart power wise, 

I believe he will be more powerful. Since he will be able to break down the fourth wall much easier and destroy his most powerful enemies though glorious and savage page ripping. 

" I believe he will be more powerful. Since he will be able to break down the fourth wall much easier and destroy his most powerful enemies though glorious and savage page ripping.  "

Probably less powerful, but he will probably get more powerful down the line. I swear to god, though, if they have Hulk knock him out when they fight (and you KNOW they're gonna fight), I'm gonna be pissed. 

" Probably less powerful, but he will probably get more powerful down the line. I swear to god, though, if they have Hulk knock him out when they fight (and you KNOW they're gonna fight), I'm gonna be pissed.  "

Thor will obviously be weaker in the movie than in comics because in real world laws of physics are much different
All the characters are too overpowered anyway
I prefer to see a bad ass Thor doing powerful stuff that is within the realms of sanity, not smashing planets and stuff
Destroying planets should be left to Galactus and above
Over the years everyones powers have escalated to stupid levels

Comic Thor has been jobbing like crazy so I say no
 
TRAILER
 

and thor will fly in the new TV spot thor says I'm gonna fly out, he was also flying when he was fighting the destroyer.

By leaps and bounds, but thats fine.

" Yes. The movie versions have all been weaker or less skilled than their comic counterparts. "