In all seriousness, the only other documentary that I'm aware of that cost a buttload for a while, that sounds vaguely similar to what the pitch for A:E is, is Lovecraft: Fear of the Unkown (great documentary, people should watch it on Prime) and that kind of went into a deep dive into some of those topics as well as discussing the stories, themes and part of the impact in less than two hours. That Blu-Ray/DVD cost up to between $100-$200 and that was because the physical media for it was out of print for a while, and that documentary cost about $20 when it was released. Now i'ts free on Prime, Tubi, Youtube. Honestly, Aliens: Expanded sounds like it won't be too dissimilar to previous In Search Of documentaries, so the pricing still remains nonsensical, especially for a glorified fan production, regardless of the quality.
Granted, Lovecraft: Fear of the Uknown has been out for more than a decade.