Apart from this match, I am also looking forward to the Dortmund vs Real Madrid match. We know these two teams met in the UCL Final last season. And now they meet again at the beginning. This will be very interesting as I think Dortmund will be looking to avenge their loss in the Final last season.
I think that match will be played on the 22 October and I believe nobody will like to miss watching that match do to the love they have on the both teams especially real Madrid because of the players they signed and fans are always curious to watch the impact they would make on the club and besides Borussia Dortmund will be coming to have a revenge against real Madrid just as you said because it always happened that whenever a club loss to another they tend to buckle up there performance when next they are going to meet them, so that is how the match will be.
I would have said real Madrid will win them just like they did the last time but they currently have deprecating performance, may be because of injuries that has been affecting the players, however I no Borussia Dortmund to be a club that normally take the champions League matches very serious.