It is very likely that both Bayern Munich and Bayer Leverkusen are going to win their away matches and for Bayern Munich this should be easier than for Leverkusen. I think Wolfsburg isn't a very good team, but also not a bad team, which means that they can resist some pressure for some time. It is still weird that Cologne is sticking to their coach and haven't done anything about it yet. But there has been some negative trend since two seasons ago when they finished 7th. In my opinion at the end of the season they could be in the relegation zone this season.
I also think that Bayern Munchen and Bayer Laverkusen will win the match in week 12. This means that the standings will not change with Xabi squad still leading in first place, I am quite sure that Koln and Bremen will not make any surprises even though both will act as hosts in their respective matches.
I only believe in Bayern Munich, for Bayer Leverkusen, even though the bookies favor them, there's a tendency that they will also get a draw in this match. Bayer Leverkusen's winning streak isn't an ordinary thing, it is not natural that they will get positive results continuously, that's the reason I'm not sure that Bayer Leverkusen can win easily against Werder Bremen.
Regarding Koln, they're currently in the relegation zone with Union Berlin, it's not impossible that they will be relegated at the end of the season considering their current performance.
I think the match will be intense, especially since all clubs have more time after the international break. However, I think Laverkusean will be able to secure full points even though he is acting as a guest. We have seen how consistent Xabi squad is this season in two competitions, the Bundesliga and the Europa League.