I was on the phone booking some tours this morning for our late Aug/early Sept trip and asked the CM about this and he stuck with the official "haven't gotten any bulletin or notification on this yet", but then we just started chatted and speculating. He was hoping they may be making a change that would allow for more people to attend since it's so popular and books up so quickly. No clue how/where they would be able to do that though.
Personally, I can't see them getting rid of this because of the popularity. What I can totally see is revamping it a bit and very likely increasing the cost. They will sell out regardless, but it would help with the supply/demand problem a little bit so that someone who isn't on the phone exactly 180 days out may still have a chance to book. I would actually be totally okay with paying a little more for it, especially if they expand the food offerings a bit.
Oh, and this same CM said he expects updated calendar next week for September. I guess time will tell!