Not sure what Man City are doing. Not sure why they would go after Dzeko, yes he is a good player but if you believe the reports and he is holding out for more money well then surely he is not going to endear himself to his new teammates. Also, considering Mancini loves the 4-5-1 and Tevez is the go to guy, he isn't going to be playing week in, week out...just ask Jo, Santa Cruz, Adebayor, etc.
Arsenal have a chance against Barcelona, but it is a very small chance. If Vermaelen isn't back, well than Messi and co. will feast on the other 3 centre halves.