actually i wouldn't be too surprised if the spanish 2 reach the semi's again next year looking at the current landscape amongst the top european leagues, the epl teams seem to be regressing too and i would say weaker than the barca and madrid, the Italians well we know they are still at a stage of rebuilding itself, i think though next season Bayern will be the only dominant German side in the advanced stages of the CL, i struggle to see how dortmund will be able to cope with the losses of both lewa and gotze, and i wouldn't be surprised if kopp leaves too (probably for madrid i would imagine)
so come next year i think we will see a similar situation than now, maybe adding psg to the mix rather than dortmund next time around.