dabest13 said:

I could see a scenario where Anakin and a group of other Jedi are sent off on a mission together. Later, Obi-wan is informed that "one of" his apprentices has turned to the dark side... Obi-wan responds to this in to something along the lines of "Anakin, is he ok?" only for the informer to simply say "he has fallen" and he hands Anakin's lightsaber over to Obi-Wan, making the audience think he is dead.

I had a "radical" thought: not sure if it came on here before, but it would just fit like a glove ... and with your idea/s to fuel it ;-)

We meet a young Jedi Knight, Obi-Wan, and his not so much younger to-be Apprentice Anakin in Episode 1, story goes from blockade/invasion to rescue/diplomatic mission ,where the political conflicts are layed down for the rest of the Saga - must think about Dooku and Maul/Grievous, where to put them (and when Qui-Gon should die).

Next Episode 2, when Anakin had some years, about 10, under Ben's training, their friendship is tested by the "Clone Wars", which started shortly before movie starts (details may follow), Palpatine has put ideas into Ani's brain, the love to Padme could be much more focus, on why Jedi outcast Skywalker - maybe build some conspiracy within the senate - E2 ends with "the duel", Anakin's fall - Victory is on the far horizon.

Conclusion in "Revenge of the Sith": the "Clone Wars" are nearly over, many deaths are to be mourned, then "Vader" a dark assassin hunts and kills Jedi and senators alike, no one knows his identity and Palpatine, who has risen to supreme ruler of the Republic declares the Jedi as enemies (maybe with proof of Dooku's and/or Anakin's foul play in the "Clone Wars") - Rest as we know it ...

Don't know if birth of the Twins should be onscreen, it brings some difficulties - same as showing Vader's "transformation".