I think I get what you mean, now. If they're going by the whole 'no model, no rules' thing, would they bring out a new model? (And by that reckoning, would they also do the same for the three leader units that are also only available from the cauldron set?)
As I mentioned before, I wouldn't be against them doing a new plastic Avatar - maybe one that's more pose able, and can work with both AoS AND 40k. (The latter is mostly my imagination running amok, but still...). But will they do it? At the moment, I think not, as there is already something that can fill the role. (It's not perfect, I know, but it's there)