Problem is, those are only two teams. If all German and English teams get the results today and tomorrow that I expect, we will see Dortmund, Bayern and Leverkusen reaching semifinals for Germany, but only Villa and City for England. Which means that Germany's lead over England would increase. Villa winning the ECL would then give the same points as Leverkusen winning the EL (I think both are favourites). So then it comes down to City vs Bayern and Dortmund to make up the gap. If Bayern and Dortmund at least get one result in their ties, even if they don't reach the final, they should have done enough to defend this lead.
But of course it can still all go completely different, as it is quite close.