Hi guys, Bayern fan here (don't worry, I'm not here to gloat, Man City is one of my favourite non-Bayern teams). To be honest, I'm pretty confident that you guys should be able to secure 2nd place. I think the main thing that your team lacked in the first two games was fluency and confidence; play seemed a bit disjointed and obviously, being that this is the first time you guys have played in the UCL, it was a bit of unfamiliar territory. That will soon change, though. The more games you play, the better you will get, especially considering the individual quality and experience of your squad (many of your players have already competed in the UCL in other teams). Given that your next two games are against Villareal, who are, quite frankly, the weakest side in the group, I'm quite certain you guys should be able to take away 6 points from the two ties. If indeed you win those two games, I think you should be able to sink Napoli (given the confidence that two wins will give you, as well as the experience). As for the second Bayern game, I think it will be extremely close (obviously, I want to see Bayern win, but, being realistic, I think it will be a hard task for us).
In terms of tactics, in the Villareal vs Bayern game, Villareal really showed quite lacklustre defending and heavy dependence on individuals (be warned, Giuseppe Rossi is quite a threat, if he's in good form). What ended up happening is we played quite a conservative game, but still ended up with quite a number of chances on goal. Villareal really lack fluidity in their gameplay and their tactics seem rather haphazard at times. Their weaknesses are really something which City, of all teams, will be able to exploit, in the same way that we did. Truth be told, the 2-0 scoreline (for the Bayern-Villareal game) is a bit misleading, as it could have been much larger in our favour. Given your wealth of attacking talent, I think you should have no trouble racking up a similar scoreline (or possibly even better).
I predict and would like to see the group end with Bayern in 1st place, City in 2nd and Napoli in 3rd. I think Napoli were lucky in their game against you guys and sooner or later, their luck will run out, especially given that we (Bayern) will be taking them on in a double tie, on the back of a strong start of season. Many Bayern fans, myself included, are expecting a win in both Napoli ties, so if we do indeed win both, this should knock the wind out of their sails, I feel.
You guys have a fantastic side, with better quality than Napoli, so I think that you certainly can come out of the group stages with a positive result.
Good luck with your remaining group games! Except for the Bayern one, of course ;)