I think RTD wrote that line back in Midnight specifically so the TARDIS would come last in a specific line of succession with the more long-term new series companions. That has more to do with my theory that the most faithful companion is the TARDIS though and that is the "death of the most faithful companion" that Dalek Caan was referring to. Jack and Mickey weren't really companions in the same sense that Rose, Martha, Donna and the TARDIS are - and I think that is exactly why RTD chose those four names."
The fact that the issue of companions breaking his heart comes up at the conclusion of the Xmas movie and that a piece of Time Technology stolen from the Daleks is also a key part of the story after Dalek Caan's reference to the most faithful companion dying in the previous story (and RTD's interview comments about the next story being TARDISless leads me to conclude it will be the TARDIS that dies.
no subject
I think RTD wrote that line back in Midnight specifically so the TARDIS would come last in a specific line of succession with the more long-term new series companions. That has more to do with my theory that the most faithful companion is the TARDIS though and that is the "death of the most faithful companion" that Dalek Caan was referring to. Jack and Mickey weren't really companions in the same sense that Rose, Martha, Donna and the TARDIS are - and I think that is exactly why RTD chose those four names."
The fact that the issue of companions breaking his heart comes up at the conclusion of the Xmas movie and that a piece of Time Technology stolen from the Daleks is also a key part of the story after Dalek Caan's reference to the most faithful companion dying in the previous story (and RTD's interview comments about the next story being TARDISless leads me to conclude it will be the TARDIS that dies.