@ghug: Maybe you could educate me, but while Augustus obviously did play a big role in making the Aeneid happen, I can see it happening without him easier than the other works I referenced.
Granted it's a modern perspective, but even then, even if it took until today, someone, it seems, would've written a Trojan POV story as a follow-up to Homer's epic, whereas you obviously can't have stories that have major plot points dependent upon Waterloo or the greater Napoleonic Wars with no Napoleon.
Put another way, the Napoleon stories are all "originals," whereas the Aeneid is a follow-up to an already-successful franchise (and I'm being extremely loose with that analogy, so no need to be pedantic and point that out, I'm just saying a follow-up to a great work, by the original author or someone else, is more likely than an "original" work, if only because great works seem to inspire sequels and prequels, whereas an original work starts from scratch, so who knows if it will be a hit, or even come to fruition and be published.)
ALSO keep in mind my post was more of an offhand quip than a genuinely serious argument. ;)