I mean Real managed to beat City before as well, and last year City managed to beat Madrid, they are both good teams and could beat each other, so it doesn't feel like that would be such a big bore, I think that seems to be the case, I feel like that seems like the most important part. I feel like the best thing about the current situation is that you could possibly make it work one way or another and should not be afraid of just going for the win.
Any team that plays too defensive against the other, would be only calling for a loss, so both teams should play as attacking as possible without fear. City could play a little bit more defensive and I fear that they could lose because of that, possession is great and all, but they need to score.