I don't think the Seahawks will have a chance. They did not convince me so far this season, and I have watched a few of their games already (our TV station seems to pick them in 2 out of 3 weekends
The Pats, however... you can love or hate Brady, but the dude sure knows how to play his game. Plus, the Pats are ahead both in terms of passing and rushing yards, and have an equally strong defence. I don't see how the Seahawks can take that one.
Chiefs vs. Panthers will be another interesting one. The Chiefs have a good run, but it looks like the Panthers finally got their act together. And if they want to remain in the playoff race, they'd better not lose too many more games.
I'm really looking forward to Cowboys vs. Steelers. Dak Prescott is playing a brilliant season so far, but now Romo is back in practice, and will certainly want his starter position back pretty soon. I wonder if that will have an impact on Prescott's game.
On the other side, Roethlisberger seems to have fully recovered from his injury, and if they manage to play like in the 4th quarter against the Ravens (okay, minus that pathetic onside kick attempt), they should stand a fair chance. It will all depend on Big Ben, though, as their running game has been pretty useless so far.
Yes, the new EU copyright directive is that stupid.