I'm sure Bony will come in and do a good job once he finally gets a real run in the team and is allowed to get going. Our team is full of goals, our striker contributing as well will just be the cherry on the cake. The most annoying thing is that Aguero had finally hit form, so it's a terrible time for him to get injured, but the team looks more than healthy going forwards. Before the Newcastle game, Aguero was hardly setting the world on fire and the team were more than holding it's own on the goalscoring front, so we can clearly cope without him.
A fully fit and firing Aguero would just be a bonus, making games a lot easier, but we should have enough even without him. De Bruyne coming in makes a huge difference as he adds a lot of goals from outside of the striker position, if we can get either Sterling scoing more off that wing or Bony to even get a goal every 2 or 3 starts then that should be fine.