Re: Roger Moore wants to do Who!!
I think all those things are possible, except the Ponds coming back (aside from a flashback maybe?
It brings back up the possibility that the Doctor travels to New York some other way than the TARDIS.
Or that the Ponds travel somewhere to find the Doctor.
Or he could just see them from afar like he did in Closing Time
Lots of ways it could be done.
Rimmer, on what period of history to live in-
“Well, It’d be the 19th century for me, one of Napoleon’s marshals.
The chance to march across Europe with the greatest general of all time and kill Belgians” - (White Hole).