Outline: Plan A: Nine-Ten-Eleven in one episode with Nine being the guy that pulled the trigger on Gallifrey.
Eccleston says "no".
Outline: Plan B: New creation Doctor (War)-Ten-Eleven where the War Doctor was the one to pull the trigger on Gallifrey.
Plan approved, write script.
Plan C: Considered not an option: Eight-Ten-Eleven where Eight is the one that pulled the trigger on Gallifrey. Both RTD and Moffat cannot see Eight as the man that would pull the trigger. Plan not implemented.
Eccleston says "no".
Outline: Plan B: New creation Doctor (War)-Ten-Eleven where the War Doctor was the one to pull the trigger on Gallifrey.
Plan approved, write script.
Plan C: Considered not an option: Eight-Ten-Eleven where Eight is the one that pulled the trigger on Gallifrey. Both RTD and Moffat cannot see Eight as the man that would pull the trigger. Plan not implemented.