When we bought in last October, I asked our sales person and he said there was nothing planned for BLT. I thought since AKV were getting Sanaa, they may put a cs or ts restaurant in, but there is nothing planned as of now. AKV are much larger in comparison to BLT, but there is so much traffic around the MK, I would think another restaurant is feasible.
From what I've read about that, entry is going to be very, very limited. BLT owners staying on BLT points is one rumor, and even then by reservation only.
That's what I am also thinking because anyone staying at Bay Lake Tower can use the walkway to the 4th floor and go right to Chef Mickey's or the Contempo Cafe. Plus it's also not hard when going to the California Grill or The Wave, so it doesn't make sense to open up any restaurants in Bay Lake Tower.