Okay, this would take a huge amount of work, but I think it is almost possible...
In AotC, Obi-Wan talks to Mace and Yoda about Anakin not being ready. Most edits replace this with the superior Obi-Wan/Mace deleted scene. I suggest we got a bit further.
What if Mace was replaced in this scene with a Force Ghost of Qui-Gonn. You'd have to find a Liam Niesen lookalike and someone who sounds like him (luckily, you wouldn't need both to be the same person). This sets up a precedence for Force Ghosts in the OT (without an awkward RotS explanation), and makes the living council seem less ignorant - Yoda and Mace shouldn't have sent Anakin on the mission, knowing of his attachments. Qui-Gonn, however, has a determined faith that blinds him a bit and thus adds motivation and depth to the dialogue in the scene. Of course it would have to be edited down so it seems Obi-Wan is talking to Qui-Gonn, but I really think it could work.
Scene Dialogue (Edits in Caps/Strikeouts)
Obi: It appears someone doesn't want us to know about this Kamino system.
Mace/QG: Which means there's something happening on that system we should know about.
Obi: Master, do you think a Jedi could have erased those files?
Mace/QG: I hope not. This disturbance in the force is making it hard to get a sense of things.
Obi: I'm concerned for my padawan ANAKIN. He is not ready to be on his own.
Mace/QG: If the prophecy is true, he is the one who will bring balance to the force.
Obi: But he still has much to learn. His skills have made him, well, arrogant. I realize now what you and master Yoda knew from the beginning, the boy was too old to start his training. Master, we should not have been given this assignment. I fear Anakin will not be able to protect the Senator.
Mace/QG: Why?
Obi: He has an emotional connection with her. It's been there since he was a boy. Now he's... confused, distracted. (this would be hard to change since it is a continuous shot.)
Mace/QG: Obi-Wan, you must have faith that he will choose the right path.
Obi: Yes, Master.
QG: MAY THE FORCE BE WITH YOU.