The S6 contract calls for both semifinals to be in the USA. However, if 2 Euros are matched in one semifinal, it could take place in Europe, as long as the fight is aired live primetime in the US. So, if we did get a Froch-AA rematch in the semis, it'll be a late night in Europe.
That sounds good, but how do you know Johnson inherits Kessler's scorecard points? He didn't inherit Kessler's 2 points for his win against Froch, so I doubt he will inherit Kessler's scorecard points.
Green inherited Taylor's scorecard points when he entered the S6, so I'd imagine Johnson has been offered the same privilege.