The former Barcelona man, 28, has watched his side lose two of their three games since his departure but he is confident about the season ahead.
"I do feel a bit guilty. I said to my wife it's difficult to be away from City right now. But if I win the Cup of Nations and then come back and win the league it will be the most amazing season for me. And I'm very positive we can do it," Toure told The Sun.
"Very positive that the Ivory Coast can win the Cup of Nations and City win the Premier League. It will be very hard, very, very difficult, but all my countrymen believe we can win the cup and all City fans believe we can win the league."
Toure has made 75 appearances for City, scoring 16 goals.