I do not think the UFC has any interest in adding the Flyweight division. Its not deep enough at the moment and its all Japanese fighters. Which as we know are very hard to get to leave Japan and come fight in America.
Also I hate the idea of a TUF tourny for a title. TUF is less about who is the best fighter in the tourny and more about who can surive fighting 3 to 4 fights in 6 weeks injury free. A somewhat minor injury can eliminate guys from TUF. Forrest was almost eliminated because of a cut over his eye remember. If it was not in the UFC format then the cut would have been an after thought and only needed a week or so to heal up and take the stiches out. But on TUF he was almost gone because he had to fight again in about 3 days.
Greatest of All Time