I should Clarrify that the Flashbacks I mentioned early briefly are alledgedly not like a flash back episode but used to illustrate the Doctors Passed origins, and used in respect of the 3 follow on stories.
If these ramblings are true it would be intresting, I'm also convinced on the possibility of two different Cybermen factions, it would be new for the Cybermen.
In respect of others views on the bringing back of an old Doctor I agree one of the newer ones is likely, although Tom Baker seems very intrested in returning in every interview he makes.
I wonder though, would CE be more likely, I state this because something has been on my mind for months. If RTD planned to do thewhole CE to DT thing right from the word go, why would CE need to return to shoot extra scenes, maybe they were for future use.
All these mysteries no doubt we'll be waiting 7 months for the answers, and then some probably wont be answered!