Yeah, I hope Rooney only plays an hour at the very most. To be fair though, City have played Hart, Maicon, Kompany, Lescott, Nastasic, Barry, Garcia, Nasri, Tevez, and Dzeko in their game. Along with subbing on Zabaleta and Aguero. The only players that played on Tuesday for City that are definitely not starting on Sunday were Sinclair and Balotelli really. You can make cases for the others but it depends on who is really 'injured' for them.
For example, Silva is apparently injured but he's guaranteed to start. Yaya Toure will come in, Clichy or Kolarov will probably be fit, while Zabaleta and Aguero would probably start again. Not sure how serious Milner's injury is (if he has one) but I'd hope he does start as he's shit. Not fully sure how City would line up, but I would guess something like this:
Hart
Zabaleta
Kompany
Nastasic / Lescott
Clichy
Barry
Toure
Garcia
Silva
Aguero
Dzeko
With Tevez, Nasri most likely to come off the bench. He might not start Dzeko but we've struggled in the air so that might be the reason he starts instead of being their super sub.
But yeah, in fairness City took their game at least moderately seriously, so we'll do the same (although I expect only 2-3 of our starters will start on Sunday, while it'll be more like 5-6 or even 7 for City).