Ok, much to take in - and also interesting to see we think very alike :-)

as a comic reader, the first new concept that jumped my eyes then, where the holocrons - a perfect media to solve some problems, as seen in the comics they can be used to train and learn, but they are more a source of information from masters long gone ...

and here comes the bonus: not only Jedi had them, the Sith also used this device to collect wisdom and share it with their kin - there were times when knowledge could have gone extinct and lost forever, therefore the data crystals are a fine thing to have ;-)

when I saw the library in Episode2, my hopes were high, we would see the odd holo lying around or even be used by students - but no.

not in the shadow of cutting a scene like "the lost 20" - another part which was resurrected in "Clone Wars" and would have given the PT more soul and meaning ...

So the prophecy: really why must it be a Jedi has given it?

I always see and hear Yoda speaking: "the future is hard to see and in motion it is" - therefore the whole concept is flawed anyway

This could be either A) it was a Sith (lord) who "wrote" it down and over the ages it was forgotten about and rediscovered, later misquoted ...

B) a force-user (or maybe "Jedi") like Pythia (say "Oracle of Delphi") - but the problem with prophecy is, that is is not clear and can be interpreted in many ways ...

And yes, those two ideas can be combined and in the end we could have a holocron with the prophecy (if one comes up with an ambivalent text, that works ...) spoken to the audience, so this closes one gaping hole ;-)

the parallels to Dune are many, but Lucas wasn't just ripping that off - too bad the idea of the "chosen one" was a central concept in Dune, that isn't as clean to install in Star Wars (see midichlorians!)

again, here are potential pitfalls, because if one wants to build Anakin as the "chosen one", there always will be the question, why Luke is the "new hope" - if Anakin is to be the "saviour"?

Twist of fate would be, Anakin being the "chosen one" the Sith saw coming, the Jedi misread the prophecy and took it for theirs, in the end the "balance" was brought back with Luke, who is not "blind" like his Jedi masters and resisted the temptation, his father fell to ...

a cool thing would be, for us hearing the prophecy in connection with events directly before or afterwards, giving the impression it really was foretold, but only later to turn in other directions, like when one part comes true in Episode1, this part in Episode2 would take another meaning.

The reception and discussion about the prophecy intrigues me, because if one states it was already fullfilled long ago (saying the quote was given in an early age of Jedi/Sith), others see it still open or not relevant - some plotpoints can be drawn from this ...

for the notion, the Sith were the source (not as the Jedi offspring) and later came Jedi from them - I think to have read, that before there were Jedi or Sith, there were only force-users without any order (they came later) - so the hint to "Stargate" is a nice one, because the Sith did suppress civilations and ruled large parts of the known galaxy, before they were overthrown (and other wars between them took place).