To be honest, with it drawing story ideas from other successful movies, I can see this working. Granted it would take quite a bit extra not shown in the trailers, which I doubt will happen, but I can see it turning out okay.
Now for the people who keep saying it doesn't have a message, it has the whole "be who you are" thing going for it, so that's a thing. A cliche thing, but at least it tries to have a message.
However due to the clear lack of exposition in the trailer, it stops you from understanding why the story happens, who the villian is, amoung other things. With the apparently lack of planning put into that, my hopes that it is done correctly is pretty low.