Bayern Munich are the favorite of everyone in this group. It's too early to say that Galatasaray will advance to the next round. But if Manchester United lose points against Copenhagen, I will start to think that Galatasaray will qualify for the next round.
I also think that no club apart from Munich and Galatasaray have a big chance of qualifying from Group A. Copenhagen has only collected one point. Actually I favor United as runners up but if you look at these 2 defeats then United's chances of qualifying are almost impossible. Even though it's still early but I see everyone also agrees that Munich and Galatasaray will qualify even though there are still 4 matches left for each club.
I think, the more appropriate scenario is about the success of Manchester United beating Copenhagen. But unfortunately, if for example in the second leg later Bayer Munich and Galatasaray can hold Manchester United to a draw. Then still, that Manchester United will only finish in third place, and will continue in the Europa League . Anyway I am sure, it looks like Manchester United has a chance to win only against Copenhagen because after all, beating Bayern Munich is very unlikely . Also about Galatasaray, it looks like Galatasaray also still has the ability to hold Manchester United to a draw because of course, Galatasaray will also maintain its position to finish as runner up.