The animation I created and how looks like in superpowers is recorded in the link below. How can I fix this?

https://www.youtube.com/watch?v=2tWRCVtUAwE&feature=youtu.be

I think it is about the armature position.

http://postimg.org/image/nksu8ws0h/

How can I correct the armature position?

The problem is solved by translating armature to (0,0,0) in blender thanks to article:

http://docs.superpowers-html5.com/en/tutorials/3d-models

Yes, I've had these issues before. Glad you could clear things up, sorry I couldn't post sooner. Two things I learned from a related issue is to apply all your object transforms to the mesh and to have all the vertices attached to a bone.