The thing I liked about the Dol Guldur edit, was that I could watch that with a selection of LOTR fan films that had the same approximate length, which would each provide some sort of context to LOTR afterwards. So as oppose to watching a six movie marathon (HOBBIT>LOTR), you could build up to watching LOTR by watching a series of shorter pieces.
I guess in a sense that’s what all these new Star Wars Anthology films are trying to do is to elaborate on individual characters/events. A Battle of Scariff movie would do so in a more direct way than Rogue One did.
The thing I really liked about the Dol Guldur edit though - which I’d hope to see in other edits - is how smart you were at presenting the information. The white council scene as I mentioned earlier went from being a dull exposition dump, to developing into something investigatory with the inter-cut scenes with Beorn and so on. It was such a nice way to set up later events.
Similar shorts in Star Wars are endless really. You could focus on any one character or event, and build up context around them by using bits from other films in flashbacks and so on. ‘Anakin’s fall’ is the most common one that we’ve seen in specific edits, and short youtube trailers. I haven’t got any specific ideas myself though!