The defender suffered a major blow, just a couple of months after signing for the club in a £4million deal from Nordsjaelland, when he ruptured a cruciate ligament in a home defeat to Newcastle.
Denmark international Okore could still make an appearance for Paul Lambert's Villa before the end of the season.
But the 21-year-old has written off his chances of being involved and is concentrating all his efforts on regaining full fitness ahead of the new campaign.
"It's about next season for me now," Okore told the Birmingham Mail.
"I am looking forward to that. I can't wait. It can't come quick enough. It will be next 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!"