i thought thor origins was awful, marvel is trying to tie it into the movie thor, also they explain that the lighting and thunder comes from the hammer which is not true , and any true thor fan knows this fact
I only skimmed through it because I have the originals, but it essentially covered all the major points. The reason Thor was banished is the same in the comics as in the film. The exact details vary by retelling, but Thor basically violates a truce with the frost giants restarting the war. The thunder and lighting tends to be highly variable. Thor only really became god of thunder with the hammer and he uses lighting on its own rarely enough its easy to think it comes from the hammer.