Bayern vs Man City
Bayern look suspect defensively. The experiment with Martinez at CB is one I don't think Pep will get away with against the top teams.
They look particularly vulnerable to the counter-attack, reminiscent in many ways to Barca. But I suppose that is the drawback when you play possession football.
Don't see the False9 working either. Barca are unique because they have the best player in the world, who can play that role better than any other. No other Striker comes close to performing it as well as Messi.
Too early to say for certain, but from what I have seen so far, Bayern do not look the unstoppable force they were last season.