I just hope the FDP don't get the foreign ministry.
In that case you could just as well hope that coalition talks with the FDP will fail and that there will be a second Grand coalition after all. The likelihood of either scenario is about 1%.
It pretty much seems they will get it. But, is that important for them to get this ministry? What's the point for them here? Don't they care more about national issues?
The smaller coalition party always gets the Foreign ministry. This has been the case since 1966, when the first Grand coalition was formed. Usually, the foreign minister is also appointed vice chancellor. The Foreign ministry is considered a very important position, maybe it is even the most important of the ministries.
Besides, Guido Westerwelle wants it. He got increasingly involved in foreign policy the last few years. And when he wants it, he gets it.
And considering how strong the FDP and how weak the CDU/CSU were in this election, the FDP will at least get four ministries. Maybe five, if they're tough negotiators. Aside from Foreign affairs, they will get either Finance or Economy. Probably also Justice. And one or two more in addition to that.