In Rose The Doctor tells her that "There is a war going on!"
I just get the feeling that a Time War spilling out across the past, present, and future, would be difficult to contain.
If you were going to try and stop the war where would you start?
Not even The Doctor could be everywhere at once, unless the Time Lords diverted power to allow all his incarnations to "meet" and send them off on missions, (as per the three Doctor's, or time scoop them as per 5 Doctor's.)
But Gallifrey has been destroyed.... I think this tactic was anticipated and that could be why Gallifrey was strategically removed.
Would the Dalek battle computers come up with something like this? Or did The Daleks once more seek help from their creator Davros?
This is all conjecture on my behalf but I don't think The Doctor can stop the war, maybe the main players have wiped themselves out, and there are still small skirmishes goin on in the heavens.
The Doctor has lost one planet he loved, he doesn't want to lose ours too, and perhaps that's why he's hanging around earth so much. The Bad Wolf is being constantly referenced in the series, could this be the cause of the Time War, or just someone capitalising on it's chaos?
Keep watching... I know I will!