^^^
Yeah, I would have rather Sting have won the belt, and then have AJ vs Sting at BFG (title vs career) and have AJ go over.
But this way works out better. If they are indeed going with the title vs career storyline, then it would make since for AJ to have the title going into the match. This way both men are putting something on the line. If Sting had the title, it'd be dumb. He'd put up the TNA title, as well as his career while AJ has nothing to lose.