Out of all the team the dude mentioned I don't consider Manchester city and inter as favorite because they have not been consistent with their winning for some time now, Manchester city's own started last season before leagues ended and it really affect them and as for Inter Milan i don't really know what to say about them because initially they were playing very well to the point that they even kick out Barcelona in semi finals and they went to finals and were playing rubbish and I was wondering if they were influence by the way PSG was playing and defeating people and after that match they have not been any better. This season I think Arsenal will do better than some of the above mentioned club.
Arsenal is in a very good form and they have equipped their Arsenal indeed, the expectations from them will be the high one as they have what it takes to compete well in the champions league and possibly win the trophy as much as possible but they already have an injured player, a key one actually although he may be back before the champions league gets tougher I only pray it does not affect their mentality but in all they have a chance just like the other top teams you have mentioned.