Thanks for the welcome. I, um, seem to have posted on a number of threads all at once. Probably most of what I posted has been hashed and rehashed, but this is the first time I've ever discussed ASOIAF, so I apologize for numerous posts and the reviving of old threads.
More speculation.
The Lannisters sent a fake Arya to wed Ramsay Bolton, the ******* of the Dreadfort, right? As soon as fake Arya gives birth to a healthy son, she's dead. Or Ramsay might take one of his own bastards from some serving wench, call it Arya's son, and murder fake Arya.
Did I read that Roose Bolton will be the new Warden of the North or did I just imagine this? Either way, he must be payed by the Lannisters. I think he will soon be Lord and Warden of the North. He might even take fake Arya for himself to strengthen his claim on Winterfell. The problem with Starkland is that it's full of Starks... breed them out! (Is it just me or is Starkland reminiscent of Scotland... the t and k sounds are transposed... and then it also seems to correspond geographically to the England analogy...) Roose Bolton would be just the sort to grant Prima Nocte.
Robb in everything but looks was his father's son. Character, honor, emotions, religion, and martial prowess. Remember that Ned got his wife pregnant just before going to war, well it seems that the dutiful son probably did the same. So what happens to Jeyne Westerling and her babe? Since the Tullys are out of favor (Edmure is a captive of the Freys), a new lord of the Trident is in order. If the new lord has not been named (he probably has and I've forgotten), then it will be Littlefinger of Harrenhal or Walder Frey of the Twins. Either way, the new lord will demand that Jeyne and her baby be turned over, if Cersei does not demand her to make obesience. She will have to be smuggled out of Riverrun by the Blackfish, the Mallisters, the Reeds, or the Manderlys. But, remember her uncle Rolph Spicer seems to be a nasty fellow and loyal to Casterly Rock... he might get his hands on her also. My guess is that the Lannisters get their hands on this newborn son, the true heir of Winterfell. He will probably be named Robb or Ned.
If Cersei is forced to wed, she'll choose someone she can manipulate, not someone to fulfill her romantically. She may perceive Willas Tyrell, the cripple, to be that man. Then again she knows the marriage must be consumated, so she won't pick someone totally disgusting...ie. it won't be Lord Gyles. But she may choose a very strong man to hold the throne for Tommen. In the Cersei preview chapter from ASOS, Kevan suggests Randyll Tarly or Mathis Rowan... both strong men. I don't know the marital status of Addam Marbrand and Amory Lorch, but both are loyal Lannister men. And because these are the pros and cons, Cersei will do none of those and marry the Sealord of Braavos. She'll hope that foreign swords will strengthen her cause.
Then again Cersei may marry Willas just to keep Mace, Loras, and the Queen of Thorns in line.