I agree that Faber may be close to the top of the list. Dana will want to get a bigger fan base for the WEC guys coming into the fold and TUF is a great way to introduce some of these guys.
Having Lesnar coach would be a fan favorite move but there is no way he is leaving his compound in Minn, plus I think that since he is still a relative new comer to the sport having a more seasoned coach would help the fighters. You can see from this season that it makes a difference who gets brought in. GSP did a great job bringing in top guys to help coach and his team made big strides in a short time. I'd give my middle nut to get that level of coaching!