Yeah I think in CNC3 there's a scrin leader, "Overlord" or something (right, Lightstorm, Bittah?

)
The leader of the rebels could be the one who ends up putting his soul in the tacitus.
It would be really cool if we could pull off the Scrin vs. Rebels from the Rebel's point of view.
It could be like a
Star Wars Episode III - esque feeling, where their doom is inevitable, and their last hope is to complete the tacitus, and send it to Earth, to give the humans a chance to beat the Scrin.
There would be a problem though basing a mission-accomplishing-type game on a story of Rebels, that will all be defeated anyways. But what if...
All of the missions were somehow based on gathering information, to put into the tacitus. (like, capturing Scrin tech centers and stuff, and keeping the tacitus away from the Scrin..)
See, the rebellion could start when a group of rebels decides to disagree with the [scrin leadership] (the ones deciding to use tiberium to destroy other planets, for their own benefit). They formed a committee and respectfully requested that planet Earth be left alone.
The [scrin leaders] are blinded by the power & wealth that they can get from the tiberium, and so they command
silence to the rebel's concerns, under the pain of death. It's at this point that the rebels begin the
tacitus project, an underground project to go around gathering all the information on the scrin leaders, their military, their the science of tiberium, to give to the people of earth.
The leaders find out about the underground, and the tacitus project, which leads to all-out war Scrin Leaders vs. Rebels. The Rebels know they can't defeat the massive power of the Scrin [leader-guys], and fight hard, but lose their teritory, and during their last stand they complete the tacitus. [Rebel-boss-dude] puts his soul into the tacitus, (maybe he gets mortally wounded, and it's the only way he can carry on?)
A crew of rebels then takes off from the scrin planet towards earth.
The ship crash-lands on Earth, and all of the passengers die. During TD Kane finds the ship, takes the tacitus, and builds the TS "Scrin ship" with it, in secret.
END PART 1
We can make a campaign around that, what say you?
(The tacitus was put in the temple during TD, and was fractured when GDI hit the temple with its ion cannon (which accounts for the missing piece in TS:Firestorm) - Someone found the piece or something, and brought it to the temple-place in that one firestorm mission)
This made the tacitus's information incomplete, although perhaps Kane backed it up in the beginning stages of forming CABAL, which could explain how he was able to translate the tacitus, even with that portion gone

although that wouldn't explain why CABAL would need it in Firestorm

)