I think we will know better once the transfer window closes. As another posted highlighted we have a huge reliance on Aguero and if he stays fit he will make up a significant shortfall of goals which we missed last season. I think we are still a creative player short as Nasri cannot be relied upon to consistently contribute and if Dzeko, Jovetic leave it could be argued we are also a striker short.
Of our rivals Chelsea have not really strengthened and from experience it is much harder to defend the trophy and I think they will need a few players to match last season.
Arsenal with a couple of additions could be a real threat but fortunately Wenger, at the minute, seems reluctant to buy a top quality defensive midfielder and dominant centre half.
I think we can do it if we get one of De Bruyne/Pogba