I doubt they will come out with a "cheaper" version. But I don't really think they will sell the dvd's seperately right as they get released, maybe a year or so later. Who knows.
I'm pretty sure that they'll sell the DVDs individually in the future but as said in another thread about True Astonishments that even though it seems like heaps, $300 is a bargain.
In my opinion I don't think they'll drop the price on that one. Just as Trilogy has always remained the same price (I think - correct me if I'm wrong). But eventually they may well sell them individually..