They'll eventually have one, be patient. Right now, I think they're trying to to focus more on the lower weight class so the lightest divisions can get more exposure. I wouldn't be surprised if the next TUF had a flyweight tournament involved.
I apoligize in advance for the impending snarky remark but it's doubtful and I'll tell you why. tuff champions cut down a weight.
If they have a fly weight champion he wouldn't have any where left to go? I think that's the main hope I have for a Heavy weight division. we might get some real LHW contenders off a HW tuff. I swear I love the smaller weight classes to death. But LHW right now is missing alot. LIke alot, alot. Hell it's sending up middle weights to bid for the title.
A little growth not only couldn't hurt, it's needed badly.