I thought that I would share this with you all. I found an interesting online fan-made comics which is entitled "Secret Alliances" and which will recount the events between Anakin Skywalker's decision to prevent Windu from killing Lord Sidious/Chancellor Palpatine and the official advent of the Empire as a replacement of the crumbling Galactic Republic. And all these events will be seen through the eyes of Mace Windu who barely survived (but survived nonetheless) his wounds (electrical shock and burns, and a cut off part of his arm) and above all his vertiginous fall. There will also be (as the title states) "secret alliances" on both sides of the political compass and chess board.
This is by no means "canon", of course, and I am well aware of that, but I find the idea most interesting. I like the idea of Qui-Gon Jinn appearing to Windu as he is in a state of shock which could have caused an altered state of consciousness, but I find it unlikely that QGJ would tell him that Anakin had to be stopped (I would have prefered a mysterious appearance of an insightful QGJ soul/ghost who would have contented himself with saying : "Don't worry, old friend, you still have a part to play, but so does Anakin, and I sense that his fall to the Dark Side will lead to an unexpected renewal. Don't worry old friend, even if I can foresee only a few of all the potential future outcomes, and even if the future is always changing, I can clearly see that there is still hope both in the soul and in the blood of Skywalker..."
Here are the first pages of the comics which develops this hypothesis and its implications, as you will see... This comics still is in development.
http://www.secretalliances.com/Comics/SecretAlliances/Preview/SecretAlliances.htmLet me know what you think of it. ;) :)