Second paragraph. Sounds promising enough, but eh.
I guess that makes it clear we should not expect Reek in Winterfell anymore. If they already had someone for the part of Reek/Ramsay, they wouldn't need to cast him for next season. With Dagmer being the devil on Theon's shoulder, we don't really need him. Though it was a great detail in the book, Theon being betrayed by the man he released from the Winterfell prison, it was just that, a detail. I also don't think we need to see or hear from the 'original' Reek. What's important about Ramsay turning Theon into Reek is the utter humiliation and breaking of the man's spirit, not that he is a replacement to some obscure servant he had before...
So what is Roose's plan in sending Ramsay to Winterfell, anyway? Is he already planning to betray the Starks in the show?
I think he is seizing the opportunity to strengthen the Boltons in the North. Having his bastard control Winterfell and both Stark heirs puts the Boltons in a very strong position if anything should happen to Robb. After all, they are at war and anything can happen to Robb, even if he isn't actively planning to have a hand in his downfall yet.
Since Ramsay seems to be working for Roose now, my guess is this:
Next episode is when he tracks down the boys and kills the miller's kids. I'm guessing the show will give us the cliffhanger of Theon stringing up two boys and some of the Winterfell staff wailing in horror.
In the Prince of Winterfell, Yara/Asha comes to visit, drops off a few men, yells at Theon for being a moron for killing the boys, then leaves. Robb & Cat get the news of Bran & Rickon's death. (Twitter explodes with the controversy of killing children, especially a handicapped one)
In episode 10, Ramsay's forces attack Winterfell and overwhelm the 30 or so men with Theon. We'll see some of the initial attack, and then they'll cut away to Theon's final scene with Wintefell burning around him, and Theon being slapped to the ground by Ramsay. (People will be cheering for Ramsay) They'll then have Roose reporting to Robb that Ramsay has retaken Winterfell, but Theon burned most of the structures to the ground when he saw he was losing. Alas, all inside were lost, save Theon who is now a prisoner.
Then, episode 10 closes with Bran & Rickon escaping Winterfell with Hodor and Osha.
Could be, but as I have said somewhere else on these boards, I wouldn't be surprised if the sack of Winterfell and the resurfacing of Bran and Rickon is pushed to season 3. Having people believe the boys are dead and Winterfell is about to be saved by the son of Roose at the end of this season, and then opening the next with Winterfell burning and the boys coming out of the crypts, would make for an opening episode that nobody would soon forget.
So, my guess:
Ep. 7: Theon leads a search party
Hunting the boys, killing the Miller's sons. (or in this case, the orphan boys sent to the farmer earlier)
Ep. 8: At Winterfell, Theon receives a visitor and holds down the fort.
Yara shows up with a ridiculous small amount of 'support', tries to convince Theon to leave Winterfell, Theon refuses.
Ep. 10: As Theon stirs his men to action, Luwin offers some final advice.
The Bolton men show up beneath the Walls of Winterfell, Luwin advises Theon to yield and take the Black, making it clear that there is no way he can hold the castle with so few men.
No need to show Ramsay except maybe as a guy in red armor seen from afar...
One thing that makes me wonder: the whole 'Roose goes north theory' was here not only because of the absence of Reek, but also to explain why Roose wasn't at Harrenhall. So, now we now for sure Roose isn't going north, the question that remains unanswered is: why is Roose not at Harrenhall?