"I thought that you were permitted to link to these pictures from photobucket?My submission was denied because they weren't on this site."
Think of it this way. If you put images into the comicvine page that is hosted on another site, what happens when that other site deletes the image someday, or even changes the image? It's considered bad web maners to hotlink images like that.
All images in our article pages must be hosted on our site.