The defender's maiden Premier League campaign was ruined by a serious knee problem that meant he managed just three league appearances.
Now fit, Okore is determined to show why manager Paul Lambert spent £4 million bringing him to England.
He told the club's official website: "It's about next season for me. That's my focus. I am looking forward to that. I can't wait. It can't come quick enough.
"It will be the coming season when I get my big chance again to prove myself. I want to show what I can do.
"The manager has been very supportive with me. He bought me - he showed great faith in me and now I want to repay him.
"He bought for me a reason - he must have believed in my ability. I will prove he was right!
"It's about getting up to speed, getting a good pre-season under my belt and then hopefully playing games.
"I am so determined to play well and impress and prove my ability to everyone - the players, the manager and the fans."
