I don't know if this is the most recent article concerning the proposed I-10 bridge, but according to the first link provided below, ALDOT has narrowed the possible sites from around 14 to 3, and this article contains a link showing the placement of the 3 finalists.
The article makes clear, however, that there is no consensus as to which of the three routes, if any, would be in the best interests of Mobile. In fact, a lot of business owners and historical preservationists appear to endorse a fourth alternative, which would increase the size of the I-65 and the Cochrane Bridge (off I-165), and route traffic from I-65 to the Cochrane bridge, and then onto the causeway, and eventually onto I-10.
According to the second article included below, "[a] state Transportation Department study from last year showed that shipyards could experience anywhere from $40 million to $250 million a year in lost business because of an I-10 bridge," which seems to confirm the objections of those who favor the I-65 route. However, the I-65 route is obviously not the most convenient route, nor is it the least expensive. So, there are benefits and drawbacks to each of the four routes being discussed.
http://mobilebaytimes.com/bridge.html
http://www.al.com/business/press-register/index.ssf?/base/business/1214385407232400.xml&coll=3